Nematicity, magnetism and superconductivity in FeSe

Bohmer, Anna E.; Kreisel, Andreas

doi:10.1088/1361-648X/aa9caa

Nematicity, magnetism and superconductivity in FeSe

Journal Article · Fri Dec 15 00:00:00 EST 2017 · Journal of Physics. Condensed Matter

DOI:https://doi.org/10.1088/1361-648X/aa9caa· OSTI ID:1415833

^[1]; ^[2]

Ames Lab., Ames, IA (United States)
Univ. Leipzig, Leipzig (Germany)

Iron-based superconductors are well known for their complex interplay between structure, magnetism and superconductivity. FeSe offers a particularly fascinating example. This material has been intensely discussed because of its extended nematic phase, whose relationship with magnetism is not obvious. Superconductivity in FeSe is highly tunable, with the superconducting transition temperature, T _c, ranging from 8 K in bulk single crystals at ambient pressure to almost 40 K under pressure or in intercalated systems, and to even higher temperatures in thin films. In this topical review, we present an overview of nematicity, magnetism and superconductivity, and discuss the interplay of these phases in FeSe. We focus on bulk FeSe and the effects of physical pressure and chemical substitutions as tuning parameters. In conclusion, the experimental results are discussed in the context of the well-studied iron-pnictide superconductors and interpretations from theoretical approaches are presented.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1415833

Report Number(s):: IS-J--9539

Journal Information:: Journal of Physics. Condensed Matter, Journal Name: Journal of Physics. Condensed Matter Journal Issue: 2 Vol. 30; ISSN 0953-8984

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Electric transport of a single-crystal iron chalcogenide FeSe superconductor: Evidence of symmetry-breakdown nematicity and additional ultrafast Dirac cone-like carriers Huynh, K. K.; Tanabe, Y.; Urata, T. Physical Review B, Vol. 90, Issue 14 https://doi.org/10.1103/PhysRevB.90.144516	journal	October 2014
Anomalous Fermi surface in FeSe seen by Shubnikov–de Haas oscillation measurements Terashima, Taichi; Kikugawa, Naoki; Kiswandhi, Andhika Physical Review B, Vol. 90, Issue 14 https://doi.org/10.1103/PhysRevB.90.144517	journal	October 2014
Emergence of the nematic electronic state in FeSe Watson, M. D.; Kim, T. K.; Haghighirad, A. A. Physical Review B, Vol. 91, Issue 15 https://doi.org/10.1103/PhysRevB.91.155106	journal	April 2015
Resistivity and magnetoresistance of FeSe single crystals under helium-gas pressure Knöner, S.; Zielke, D.; Köhler, S. Physical Review B, Vol. 91, Issue 17 https://doi.org/10.1103/PhysRevB.91.174510	journal	May 2015
Strong ( π , 0 ) spin fluctuations in β − FeSe observed by neutron spectroscopy Rahn, M. C.; Ewings, R. A.; Sedlmaier, S. J. Physical Review B, Vol. 91, Issue 18 https://doi.org/10.1103/PhysRevB.91.180501	journal	May 2015
Origin of nematic order in FeSe Chubukov, Andrey V.; Fernandes, Rafael M.; Schmalian, Joerg Physical Review B, Vol. 91, Issue 20 https://doi.org/10.1103/PhysRevB.91.201105	journal	May 2015
Observation of two distinct d x z / d y z band splittings in FeSe Zhang, P.; Qian, T.; Richard, P. Physical Review B, Vol. 91, Issue 21 https://doi.org/10.1103/PhysRevB.91.214503	journal	June 2015
Enhanced superconducting transition temperature in hyper-interlayer-expanded FeSe despite the suppressed electronic nematic order and spin fluctuations Hrovat, Matevž Majcen; Jeglič, Peter; Klanjšek, Martin Physical Review B, Vol. 92, Issue 9 https://doi.org/10.1103/PhysRevB.92.094513	journal	September 2015
Suppression of orbital ordering by chemical pressure in FeSe 1 − x S x Watson, M. D.; Kim, T. K.; Haghighirad, A. A. Physical Review B, Vol. 92, Issue 12 https://doi.org/10.1103/PhysRevB.92.121108	journal	September 2015
Robust determination of the superconducting gap sign structure via quasiparticle interference Hirschfeld, P. J.; Altenfeld, D.; Eremin, I. Physical Review B, Vol. 92, Issue 18 https://doi.org/10.1103/PhysRevB.92.184513	journal	November 2015
Momentum-dependent sign inversion of orbital order in superconducting FeSe Suzuki, Y.; Shimojima, T.; Sonobe, T. Physical Review B, Vol. 92, Issue 20 https://doi.org/10.1103/PhysRevB.92.205117	journal	November 2015
Spin excitations in a model of FeSe with orbital ordering Kreisel, A.; Mukherjee, Shantanu; Hirschfeld, P. J. Physical Review B, Vol. 92, Issue 22 https://doi.org/10.1103/PhysRevB.92.224515	journal	December 2015
Superconductivity pairing mechanism from cobalt impurity doping in FeSe: Spin ( s ± ) or orbital ( s + + ) fluctuation Urata, T.; Tanabe, Y.; Huynh, K. K. Physical Review B, Vol. 93, Issue 1 https://doi.org/10.1103/PhysRevB.93.014507	journal	January 2016
Nonmonotonic pressure evolution of the upper critical field in superconducting FeSe Kaluarachchi, Udhara S.; Taufour, Valentin; Böhmer, Anna E. Physical Review B, Vol. 93, Issue 6 https://doi.org/10.1103/PhysRevB.93.064503	journal	February 2016
Fermi surface reconstruction in FeSe under high pressure Terashima, Taichi; Kikugawa, Naoki; Kiswandhi, Andhika Physical Review B, Vol. 93, Issue 9 https://doi.org/10.1103/PhysRevB.93.094505	journal	March 2016
Strong anisotropy in nearly ideal tetrahedral superconducting FeS single crystals Borg, Christopher K. H.; Zhou, Xiuquan; Eckberg, Christopher Physical Review B, Vol. 93, Issue 9 https://doi.org/10.1103/PhysRevB.93.094522	journal	March 2016
Electron carriers with possible Dirac-cone-like dispersion in FeSe 1 − x S x ( x = 0 and 0.14) single crystals triggered by structural transition Sun, Yue; Pyon, Sunseng; Tamegai, Tsuyoshi Physical Review B, Vol. 93, Issue 10 https://doi.org/10.1103/PhysRevB.93.104502	journal	March 2016
Nodal superconducting gap in tetragonal FeS Xing, Jie; Lin, Hai; Li, Yufeng Physical Review B, Vol. 93, Issue 10 https://doi.org/10.1103/PhysRevB.93.104520	journal	March 2016
Interatomic Coulomb interaction and electron nematic bond order in FeSe Jiang, Kun; Hu, Jiangping; Ding, Hong Physical Review B, Vol. 93, Issue 11 https://doi.org/10.1103/PhysRevB.93.115138	journal	March 2016
Coexistence of low-moment magnetism and superconductivity in tetragonal FeS and suppression of T c under pressure Holenstein, S.; Pachmayr, U.; Guguchia, Z. Physical Review B, Vol. 93, Issue 14 https://doi.org/10.1103/PhysRevB.93.140506	journal	April 2016
Multiband superconductivity and large anisotropy in FeS crystals Lin, Hai; Li, Yufeng; Deng, Qiang Physical Review B, Vol. 93, Issue 14 https://doi.org/10.1103/PhysRevB.93.144505	journal	April 2016
Nematicity and in-plane anisotropy of superconductivity in β − FeSe detected by Se 77 nuclear magnetic resonance Baek, S. -H.; Efremov, D. V.; Ok, J. M. Physical Review B, Vol. 93, Issue 18 https://doi.org/10.1103/PhysRevB.93.180502	journal	May 2016
Magnetotransport study of the pressure-induced antiferromagnetic phase in FeSe Terashima, Taichi; Kikugawa, Naoki; Kasahara, Shigeru Physical Review B, Vol. 93, Issue 18 https://doi.org/10.1103/PhysRevB.93.180503	journal	May 2016
Nematic antiferromagnetic states in bulk FeSe Liu, Kai; Lu, Zhong-Yi; Xiang, Tao Physical Review B, Vol. 93, Issue 20 https://doi.org/10.1103/PhysRevB.93.205154	journal	May 2016
Impurity scattering effects on the superconducting properties and the tetragonal-to-orthorhombic phase transition in FeSe Abdel-Hafiez, M.; Pu, Y. J.; Brisbois, J. Physical Review B, Vol. 93, Issue 22 https://doi.org/10.1103/PhysRevB.93.224508	journal	June 2016
Strong-coupling superconductivity revealed by scanning tunneling microscope in tetragonal FeS Yang, Xiong; Du, Zengyi; Du, Guan Physical Review B, Vol. 94, Issue 2 https://doi.org/10.1103/PhysRevB.94.024521	journal	July 2016
Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe Böhmer, A. E.; Taufour, V.; Straszheim, W. E. Physical Review B, Vol. 94, Issue 2 https://doi.org/10.1103/PhysRevB.94.024526	journal	July 2016
Competing collinear magnetic structures in superconducting FeSe by first-principles quantum Monte Carlo calculations Busemeyer, Brian; Dagrada, Mario; Sorella, Sandro Physical Review B, Vol. 94, Issue 3 https://doi.org/10.1103/PhysRevB.94.035108	journal	July 2016
Enhancement of superconducting transition temperature by pointlike disorder and anisotropic energy gap in FeSe single crystals Teknowijoyo, S.; Cho, K.; Tanatar, M. A. Physical Review B, Vol. 94, Issue 6 https://doi.org/10.1103/PhysRevB.94.064521	journal	August 2016
Nodal superconductivity in FeS: Evidence from quasiparticle heat transport Ying, T. P.; Lai, X. F.; Hong, X. C. Physical Review B, Vol. 94, Issue 10 https://doi.org/10.1103/PhysRevB.94.100504	journal	September 2016
Structural-transition-induced quasi-two-dimensional Fermi surface in FeSe Sun, Yue; Yamada, Tatsuhiro; Pyon, Sunseng Physical Review B, Vol. 94, Issue 13 https://doi.org/10.1103/PhysRevB.94.134505	journal	October 2016
Orbital-dependent Fermi surface shrinking as a fingerprint of nematicity in FeSe Fanfarillo, Laura; Mansart, Joseph; Toulemonde, Pierre Physical Review B, Vol. 94, Issue 15 https://doi.org/10.1103/PhysRevB.94.155138	journal	October 2016
Forces for structural optimizations in correlated materials within a DFT+embedded DMFT functional approach Haule, Kristjan; Pascut, Gheorghe L. Physical Review B, Vol. 94, Issue 19 https://doi.org/10.1103/PhysRevB.94.195146	journal	November 2016
Evidence for unidirectional nematic bond ordering in FeSe Watson, M. D.; Kim, T. K.; Rhodes, L. C. Physical Review B, Vol. 94, Issue 20 https://doi.org/10.1103/PhysRevB.94.201107	journal	November 2016
Formation of Hubbard-like bands as a fingerprint of strong electron-electron interactions in FeSe Watson, Matthew D.; Backes, Steffen; Haghighirad, Amir A. Physical Review B, Vol. 95, Issue 8 https://doi.org/10.1103/PhysRevB.95.081106	journal	February 2017
Competing instabilities, orbital ordering, and splitting of band degeneracies from a parquet renormalization group analysis of a four-pocket model for iron-based superconductors: Application to FeSe Xing, Rui-Qi; Classen, Laura; Khodas, Maxim Physical Review B, Vol. 95, Issue 8 https://doi.org/10.1103/PhysRevB.95.085108	journal	February 2017
Interplay of nematic and magnetic orders in FeSe under pressure Scherer, Daniel D.; Jacko, A. C.; Friedrich, Christoph Physical Review B, Vol. 95, Issue 9 https://doi.org/10.1103/PhysRevB.95.094504	journal	March 2017
Orbital selective pairing and gap structures of iron-based superconductors Kreisel, Andreas; Andersen, Brian M.; Sprau, P. O. Physical Review B, Vol. 95, Issue 17 https://doi.org/10.1103/PhysRevB.95.174504	journal	May 2017
Pressure-induced magnetic order in FeSe: A muon spin rotation study Khasanov, Rustem; Guguchia, Zurab; Amato, Alex Physical Review B, Vol. 95, Issue 18 https://doi.org/10.1103/PhysRevB.95.180504	journal	May 2017
Robustness of a quasiparticle interference test for sign-changing gaps in multiband superconductors Martiny, Johannes H. J.; Kreisel, Andreas; Hirschfeld, P. J. Physical Review B, Vol. 95, Issue 18 https://doi.org/10.1103/PhysRevB.95.184507	journal	May 2017
Strongly enhanced temperature dependence of the chemical potential in FeSe Rhodes, L. C.; Watson, M. D.; Haghighirad, A. A. Physical Review B, Vol. 95, Issue 19 https://doi.org/10.1103/PhysRevB.95.195111	journal	May 2017
Possible nematic spin liquid in spin-1 antiferromagnetic system on the square lattice: Implications for the nematic paramagnetic state of FeSe Gong, Shou-Shu; Zhu, W.; Sheng, D. N. Physical Review B, Vol. 95, Issue 20 https://doi.org/10.1103/PhysRevB.95.205132	journal	May 2017
Complex biphase nature of the superconducting dome of the FeSe phase diagram Svitlyk, V.; Raba, M.; Dmitriev, V. Physical Review B, Vol. 96, Issue 1 https://doi.org/10.1103/PhysRevB.96.014520	journal	July 2017
Weakening of the diamagnetic shielding in FeSe 1 − x S x at high pressures Yip, K. Y.; Chan, Y. C.; Niu, Q. Physical Review B, Vol. 96, Issue 2 https://doi.org/10.1103/PhysRevB.96.020502	journal	July 2017
Dome of magnetic order inside the nematic phase of sulfur-substituted FeSe under pressure Xiang, Li; Kaluarachchi, Udhara S.; Böhmer, Anna E. Physical Review B, Vol. 96, Issue 2 https://doi.org/10.1103/PhysRevB.96.024511	journal	July 2017
Effect of electron correlations on the electronic structure and phase stability of FeSe upon lattice expansion Skornyakov, S. L.; Anisimov, V. I.; Vollhardt, D. Physical Review B, Vol. 96, Issue 3 https://doi.org/10.1103/PhysRevB.96.035137	journal	July 2017
Highly anisotropic superconducting gaps and possible evidence of antiferromagnetic order in FeSe single crystals Chen, Guan-Yu; Zhu, Xiyu; Yang, Huan Physical Review B, Vol. 96, Issue 6 https://doi.org/10.1103/PhysRevB.96.064524	journal	August 2017
Impurity-induced bound states inside the superconducting gap of FeSe Jiao, Lin; Rößler, Sahana; Koz, Cevriye Physical Review B, Vol. 96, Issue 9 https://doi.org/10.1103/PhysRevB.96.094504	journal	September 2017
Superconducting gaps in FeSe studied by soft point-contact Andreev reflection spectroscopy Naidyuk, Yu. G.; Kvitnitskaya, O. E.; Gamayunova, N. V. Physical Review B, Vol. 96, Issue 9 https://doi.org/10.1103/PhysRevB.96.094517	journal	September 2017
In-plane anisotropy of transport coefficients in electronic nematic states: Universal origin of nematicity in Fe-based superconductors Onari, Seiichiro; Kontani, Hiroshi Physical Review B, Vol. 96, Issue 9 https://doi.org/10.1103/PhysRevB.96.094527	journal	September 2017
Robust short-range-ordered nematicity in FeSe evidenced by high-pressure NMR Wang, P. S.; Zhou, P.; Sun, S. S. Physical Review B, Vol. 96, Issue 9 https://doi.org/10.1103/PhysRevB.96.094528	journal	September 2017
Anomalous temperature evolution of the electronic structure of FeSe Kushnirenko, Y. S.; Kordyuk, A. A.; Fedorov, A. V. Physical Review B, Vol. 96, Issue 10 https://doi.org/10.1103/PhysRevB.96.100504	journal	September 2017
Suppression of electronic correlations by chemical pressure from FeSe to FeS Reiss, P.; Watson, M. D.; Kim, T. K. Physical Review B, Vol. 96, Issue 12 https://doi.org/10.1103/PhysRevB.96.121103	journal	September 2017
Optical anisotropy in the electronic nematic phase of FeSe Chinotti, M.; Pal, A.; Degiorgi, L. Physical Review B, Vol. 96, Issue 12 https://doi.org/10.1103/PhysRevB.96.121112	journal	September 2017
Symmetry-unprotected nodes or gap minima in the s + + state of monocrystalline FeSe Sun, Yue; Park, Akiyoshi; Pyon, Sunseng Physical Review B, Vol. 96, Issue 14 https://doi.org/10.1103/PhysRevB.96.140505	journal	October 2017
NMR evidence for static local nematicity and its cooperative interplay with low-energy magnetic fluctuations in FeSe under pressure Wiecki, P.; Nandi, M.; Böhmer, A. E. Physical Review B, Vol. 96, Issue 18 https://doi.org/10.1103/PhysRevB.96.180502	journal	November 2017
Why Does Undoped FeSe Become a High- T c Superconductor under Pressure? Imai, T.; Ahilan, K.; Ning, F. L. Physical Review Letters, Vol. 102, Issue 17 https://doi.org/10.1103/PhysRevLett.102.177005	journal	April 2009
Tunable ( δ π , δ π )-Type Antiferromagnetic Order in α -Fe(Te,Se) Superconductors Bao, Wei; Qiu, Y.; Huang, Q. Physical Review Letters, Vol. 102, Issue 24 https://doi.org/10.1103/PhysRevLett.102.247001	journal	June 2009
Tetragonal-to-Orthorhombic Structural Phase Transition at 90 K in the Superconductor Fe 1.01 Se McQueen, T. M.; Williams, A. J.; Stephens, P. W. Physical Review Letters, Vol. 103, Issue 5 https://doi.org/10.1103/PhysRevLett.103.057002	journal	July 2009
Anomalous Suppression of the Orthorhombic Lattice Distortion in Superconducting Ba ( Fe 1 − x Co x ) 2 As 2 Single Crystals Nandi, S.; Kim, M. G.; Kreyssig, A. Physical Review Letters, Vol. 104, Issue 5 https://doi.org/10.1103/PhysRevLett.104.057006	journal	February 2010
Control of the Competition between a Magnetic Phase and a Superconducting Phase in Cobalt-Doped and Nickel-Doped NaFeAs Using Electron Count Parker, Dinah R.; Smith, Matthew J. P.; Lancaster, Tom Physical Review Letters, Vol. 104, Issue 5 https://doi.org/10.1103/PhysRevLett.104.057007	journal	February 2010
Pressure Induced Static Magnetic Order in Superconducting FeSe 1 − x Bendele, M.; Amato, A.; Conder, K. Physical Review Letters, Vol. 104, Issue 8 https://doi.org/10.1103/PhysRevLett.104.087003	journal	February 2010
Unconventional Superconductivity and Antiferromagnetic Quantum Critical Behavior in the Isovalent-Doped BaFe 2 ( As 1 − x P x ) 2 Nakai, Y.; Iye, T.; Kitagawa, S. Physical Review Letters, Vol. 105, Issue 10 https://doi.org/10.1103/PhysRevLett.105.107003	journal	September 2010
Effects of Nematic Fluctuations on the Elastic Properties of Iron Arsenide Superconductors Fernandes, R. M.; VanBebber, L. H.; Bhattacharya, S. Physical Review Letters, Vol. 105, Issue 15 https://doi.org/10.1103/PhysRevLett.105.157003	journal	October 2010
Suppression of Superconductivity by Twin Boundaries in FeSe Song, Can-Li; Wang, Yi-Lin; Jiang, Ye-Ping Physical Review Letters, Vol. 109, Issue 13 https://doi.org/10.1103/PhysRevLett.109.137004	journal	September 2012
NMR Search for the Spin Nematic State in a LaFeAsO Single Crystal Fu, M.; Torchetti, D. A.; Imai, T. Physical Review Letters, Vol. 109, Issue 24 https://doi.org/10.1103/PhysRevLett.109.247001	journal	December 2012
Anisotropy of the In-Plane Resistivity of Underdoped Ba ( Fe 1 − x Co x ) 2 As 2 Superconductors Induced by Impurity Scattering in the Antiferromagnetic Orthorhombic Phase Ishida, S.; Nakajima, M.; Liang, T. Physical Review Letters, Vol. 110, Issue 20 https://doi.org/10.1103/PhysRevLett.110.207001	journal	May 2013
Observation of Incipient Charge Nematicity in Ba ( Fe 1 − X Co X ) 2 As 2 Gallais, Y.; Fernandes, R. M.; Paul, I. Physical Review Letters, Vol. 111, Issue 26 https://doi.org/10.1103/PhysRevLett.111.267001	journal	December 2013
Nematic Susceptibility of Hole-Doped and Electron-Doped Ba F e 2 As 2 Iron-Based Superconductors from Shear Modulus Measurements Böhmer, A. E.; Burger, P.; Hardy, F. Physical Review Letters, Vol. 112, Issue 4 https://doi.org/10.1103/PhysRevLett.112.047001	journal	January 2014
Reconstruction of Band Structure Induced by Electronic Nematicity in an FeSe Superconductor Nakayama, K.; Miyata, Y.; Phan, G. N. Physical Review Letters, Vol. 113, Issue 23 https://doi.org/10.1103/PhysRevLett.113.237001	journal	December 2014
Origin of the Tetragonal-to-Orthorhombic Phase Transition in FeSe: A Combined Thermodynamic and NMR Study of Nematicity Böhmer, A. E.; Arai, T.; Hardy, F. Physical Review Letters, Vol. 114, Issue 2 https://doi.org/10.1103/PhysRevLett.114.027001	journal	January 2015
Neutron-Scattering Measurements of Spin Excitations in LaFeAsO and Ba ( Fe 0.953 Co 0.047 ) 2 As 2 : Evidence for a Sharp Enhancement of Spin Fluctuations by Nematic Order Zhang, Qiang; Fernandes, Rafael M.; Lamsal, Jagat Physical Review Letters, Vol. 114, Issue 5 https://doi.org/10.1103/PhysRevLett.114.057001	journal	February 2015
Model of Electronic Structure and Superconductivity in Orbitally Ordered FeSe Mukherjee, Shantanu; Kreisel, A.; Hirschfeld, P. J. Physical Review Letters, Vol. 115, Issue 2 https://doi.org/10.1103/PhysRevLett.115.026402	journal	July 2015
Dichotomy between the Hole and Electron Behavior in Multiband Superconductor FeSe Probed by Ultrahigh Magnetic Fields Watson, M. D.; Yamashita, T.; Kasahara, S. Physical Review Letters, Vol. 115, Issue 2 https://doi.org/10.1103/PhysRevLett.115.027006	journal	July 2015
Antiferroquadrupolar and Ising-Nematic Orders of a Frustrated Bilinear-Biquadratic Heisenberg Model and Implications for the Magnetism of FeSe Yu, Rong; Si, Qimiao Physical Review Letters, Vol. 115, Issue 11 https://doi.org/10.1103/PhysRevLett.115.116401	journal	September 2015
Observation of Double-Dome Superconductivity in Potassium-Doped FeSe Thin Films Song, Can-Li; Zhang, Hui-Min; Zhong, Yong Physical Review Letters, Vol. 116, Issue 15 https://doi.org/10.1103/PhysRevLett.116.157001	journal	April 2016
Sign-Reversing Orbital Polarization in the Nematic Phase of FeSe due to the C 2 Symmetry Breaking in the Self-Energy Onari, Seiichiro; Yamakawa, Youichi; Kontani, Hiroshi Physical Review Letters, Vol. 116, Issue 22 https://doi.org/10.1103/PhysRevLett.116.227001	journal	June 2016
Orbital Selective Spin Excitations and their Impact on Superconductivity of LiFe 1 − x Co x As Li, Yu; Yin, Zhiping; Wang, Xiancheng Physical Review Letters, Vol. 116, Issue 24 https://doi.org/10.1103/PhysRevLett.116.247001	journal	June 2016
Spin Ferroquadrupolar Order in the Nematic Phase of FeSe Wang, Zhentao; Hu, Wen-Jun; Nevidomskyy, Andriy H. Physical Review Letters, Vol. 116, Issue 24 https://doi.org/10.1103/PhysRevLett.116.247203	journal	June 2016
Thermal Conductivity of the Iron-Based Superconductor FeSe: Nodeless Gap with a Strong Two-Band Character Bourgeois-Hope, P.; Chi, S.; Bonn, D. A. Physical Review Letters, Vol. 117, Issue 9 https://doi.org/10.1103/PhysRevLett.117.097003	journal	August 2016
Origin of the Resistivity Anisotropy in the Nematic Phase of FeSe Tanatar, M. A.; Böhmer, A. E.; Timmons, E. I. Physical Review Letters, Vol. 117, Issue 12 https://doi.org/10.1103/PhysRevLett.117.127001	journal	September 2016
Highly Anisotropic and Twofold Symmetric Superconducting Gap in Nematically Ordered FeSe 0.93 S 0.07 Xu, H. C.; Niu, X. H.; Xu, D. F. Physical Review Letters, Vol. 117, Issue 15 https://doi.org/10.1103/PhysRevLett.117.157003	journal	October 2016
Superconductivity in FeSe Thin Films Driven by the Interplay between Nematic Fluctuations and Spin-Orbit Coupling Kang, Jian; Fernandes, Rafael M. Physical Review Letters, Vol. 117, Issue 21 https://doi.org/10.1103/PhysRevLett.117.217003	journal	November 2016
Pressure Induced Stripe-Order Antiferromagnetism and First-Order Phase Transition in Fese Wang, P. S.; Sun, S. S.; Cui, Y. Physical Review Letters, Vol. 117, Issue 23 https://doi.org/10.1103/PhysRevLett.117.237001	journal	November 2016
Interplay between Magnetism, Superconductivity, and Orbital Order in 5-Pocket Model for Iron-Based Superconductors: Parquet Renormalization Group Study Classen, Laura; Xing, Rui-Qi; Khodas, Maxim Physical Review Letters, Vol. 118, Issue 3 https://doi.org/10.1103/PhysRevLett.118.037001	journal	January 2017
Coexistence of Replica Bands and Superconductivity in FeSe Monolayer Films Rebec, S. N.; Jia, T.; Zhang, C. Physical Review Letters, Vol. 118, Issue 6 https://doi.org/10.1103/PhysRevLett.118.067002	journal	February 2017
How Correlated is the FeSe / SrTiO 3 System? Mandal, Subhasish; Zhang, Peng; Ismail-Beigi, Sohrab Physical Review Letters, Vol. 119, Issue 6 https://doi.org/10.1103/PhysRevLett.119.067004	journal	August 2017
Extraordinary Doping Effects on Quasiparticle Scattering and Bandwidth in Iron-Based Superconductors Ye, Z. R.; Zhang, Y.; Chen, F. Physical Review X, Vol. 4, Issue 3 https://doi.org/10.1103/PhysRevX.4.031041	journal	September 2014
Evidence for Time-Reversal Symmetry Breaking of the Superconducting State near Twin-Boundary Interfaces in FeSe Revealed by Scanning Tunneling Spectroscopy Watashige, T.; Tsutsumi, Y.; Hanaguri, T. Physical Review X, Vol. 5, Issue 3 https://doi.org/10.1103/PhysRevX.5.031022	journal	August 2015
Nematicity and Magnetism in FeSe and Other Families of Fe-Based Superconductors Yamakawa, Youichi; Onari, Seiichiro; Kontani, Hiroshi Physical Review X, Vol. 6, Issue 2 https://doi.org/10.1103/PhysRevX.6.021032	journal	June 2016
Magnetism, Superconductivity, and Spontaneous Orbital Order in Iron-Based Superconductors: Which Comes First and Why? Chubukov, Andrey V.; Khodas, M.; Fernandes, Rafael M. Physical Review X, Vol. 6, Issue 4 https://doi.org/10.1103/PhysRevX.6.041045	journal	December 2016
Prominent Role of Spin-Orbit Coupling in FeSe Revealed by Inelastic Neutron Scattering Ma, Mingwei; Bourges, Philippe; Sidis, Yvan Physical Review X, Vol. 7, Issue 2 https://doi.org/10.1103/PhysRevX.7.021025	journal	May 2017
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Phase diagrams of Ba ( Fe 1 − x M x ) 2 As 2 single crystals ( M = Rh and Pd) Ni, N.; Thaler, A.; Kracher, A. Physical Review B, Vol. 80, Issue 2 https://doi.org/10.1103/physrevb.80.024511	journal	July 2009
Physical and magnetic properties of Ba ( Fe 1 − x Ru x ) 2 As 2 single crystals Thaler, A.; Ni, N.; Kracher, A. Physical Review B, Vol. 82, Issue 1 https://doi.org/10.1103/physrevb.82.014534	journal	July 2010
Character of the structural and magnetic phase transitions in the parent and electron-doped BaFe 2 As 2 compounds Kim, M. G.; Fernandes, R. M.; Kreyssig, A. Physical Review B, Vol. 83, Issue 13 https://doi.org/10.1103/physrevb.83.134522	journal	April 2011
Magnetoelastic coupling in the phase diagram of Ba 1 − x K x Fe 2 As 2 as seen via neutron diffraction Avci, S.; Chmaissem, O.; Goremychkin, E. A. Physical Review B, Vol. 83, Issue 17 https://doi.org/10.1103/physrevb.83.172503	journal	May 2011
Molecular-beam epitaxy and robust superconductivity of stoichiometric FeSe crystalline films on bilayer graphene Song, Can-Li; Wang, Yi-Lin; Jiang, Ye-Ping Physical Review B, Vol. 84, Issue 2 https://doi.org/10.1103/physrevb.84.020503	journal	July 2011
Coexistence of isotropic and extended s -wave order parameters in FeSe as revealed by low-temperature specific heat Lin, J. -Y.; Hsieh, Y. S.; Chareev, D. A. Physical Review B, Vol. 84, Issue 22 https://doi.org/10.1103/physrevb.84.220507	journal	December 2011
Coexistence of superconductivity and magnetism in FeSe 1 − x under pressure Bendele, M.; Ichsanow, A.; Pashkevich, Yu. Physical Review B, Vol. 85, Issue 6 https://doi.org/10.1103/physrevb.85.064517	journal	February 2012
Anisotropic vortex lattice structures in the FeSe superconductor Hung, Hsiang-Hsuan; Song, Can-Li; Chen, Xi Physical Review B, Vol. 85, Issue 10 https://doi.org/10.1103/physrevb.85.104510	journal	March 2012
Low-temperature phase diagram of Fe 1 + y Te studied using x-ray diffraction Koz, Cevriye; Rößler, Sahana; Tsirlin, Alexander A. Physical Review B, Vol. 88, Issue 9 https://doi.org/10.1103/physrevb.88.094509	journal	September 2013
Anomalous Fermi surface in FeSe seen by Shubnikov–de Haas oscillation measurements Terashima, Taichi; Kikugawa, Naoki; Kiswandhi, Andhika Physical Review B, Vol. 90, Issue 14 https://doi.org/10.1103/physrevb.90.144517	journal	October 2014
Emergence of the nematic electronic state in FeSe Watson, M. D.; Kim, T. K.; Haghighirad, A. A. Physical Review B, Vol. 91, Issue 15 https://doi.org/10.1103/physrevb.91.155106	journal	April 2015
Resistivity and magnetoresistance of FeSe single crystals under helium-gas pressure Knöner, S.; Zielke, D.; Köhler, S. Physical Review B, Vol. 91, Issue 17 https://doi.org/10.1103/physrevb.91.174510	journal	May 2015
Origin of nematic order in FeSe Chubukov, Andrey V.; Fernandes, Rafael M.; Schmalian, Joerg Physical Review B, Vol. 91, Issue 20 https://doi.org/10.1103/physrevb.91.201105	journal	May 2015
Observation of two distinct d x z / d y z band splittings in FeSe Zhang, P.; Qian, T.; Richard, P. Physical Review B, Vol. 91, Issue 21 https://doi.org/10.1103/physrevb.91.214503	journal	June 2015
Enhanced superconducting transition temperature in hyper-interlayer-expanded FeSe despite the suppressed electronic nematic order and spin fluctuations Hrovat, Matevž Majcen; Jeglič, Peter; Klanjšek, Martin Physical Review B, Vol. 92, Issue 9 https://doi.org/10.1103/physrevb.92.094513	journal	September 2015
Robust determination of the superconducting gap sign structure via quasiparticle interference Hirschfeld, P. J.; Altenfeld, D.; Eremin, I. Physical Review B, Vol. 92, Issue 18 https://doi.org/10.1103/physrevb.92.184513	journal	November 2015
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Precise Pressure Dependence of the Superconducting Transition Temperature of FeSe: Resistivity and ⁷⁷ Se-NMR Study Masaki, Satoru; Kotegawa, Hisashi; Hara, Yudai Journal of the Physical Society of Japan, Vol. 78, Issue 6 https://doi.org/10.1143/JPSJ.78.063704	journal	June 2009
Substitution Effects on FeSe Superconductor Mizuguchi, Yoshikazu; Tomioka, Fumiaki; Tsuda, Shunsuke Journal of the Physical Society of Japan, Vol. 78, Issue 7 https://doi.org/10.1143/JPSJ.78.074712	journal	July 2009
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Strong Interplay between Stripe Spin Fluctuations, Nematicity and Superconductivity in FeSe Wang, Qisi; Shen, Yao; Pan, Bingying arXiv https://doi.org/10.48550/arxiv.1502.07544	text	January 2015
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Strong anisotropy in nearly ideal-tetrahedral superconducting FeS single crystals Borg, Christopher K. H.; Zhou, Xiuquan; Eckberg, Christopher arXiv https://doi.org/10.48550/arxiv.1512.01245	text	January 2015
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High Temperature Superconductivity in FeSe Monolayers Sadovskii, M. V. arXiv https://doi.org/10.48550/arxiv.1605.04426	text	January 2016
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Anomalous temperature evolution of the electronic structure of FeSe Kushnirenko, Y.; Kordyuk, A. A.; Fedorov, A. arXiv https://doi.org/10.48550/arxiv.1702.02088	text	January 2017
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Disorder-induced electronic nematicity Steffensen, Daniel; Kotetes, Panagiotis; Paul, Indranil Physical Review B, Vol. 100, Issue 6 https://doi.org/10.1103/physrevb.100.064521	journal	August 2019
Theory of two-fluid metallicity in superconducting FeSe at high pressure Craco, L.; Leoni, S. Physical Review B, Vol. 100, Issue 12 https://doi.org/10.1103/physrevb.100.121101	journal	September 2019
Spin fluctuation anisotropy as a probe of orbital-selective hole-electron quasiparticle excitations in detwinned Ba ( Fe 1 − x Co x ) 2 As 2 Tian, Long; Liu, Panpan; Xu, Zhuang Physical Review B, Vol. 100, Issue 13 https://doi.org/10.1103/physrevb.100.134509	journal	October 2019
Lattice dynamics in FeSe via inelastic x-ray scattering and first-principles calculations Murai, Naoki; Fukuda, Tatsuo; Nakajima, Masamichi Physical Review B, Vol. 101, Issue 3 https://doi.org/10.1103/physrevb.101.035126	journal	January 2020
Evidence for short-range magnetic order in the nematic phase of FeSe from anisotropic in-plane magnetostriction and susceptibility measurements He, Mingquan; Wang, Liran; Hardy, Frédéric Physical Review B, Vol. 97, Issue 10 https://doi.org/10.1103/physrevb.97.104107	journal	March 2018
Persistent correlation between superconductivity and antiferromagnetic fluctuations near a nematic quantum critical point in FeSe 1 − x S x Wiecki, P.; Rana, K.; Böhmer, A. E. Physical Review B, Vol. 98, Issue 2 https://doi.org/10.1103/physrevb.98.020507	journal	July 2018
Itinerant approach to magnetic neutron scattering of FeSe: Effect of orbital selectivity Kreisel, Andreas; Andersen, Brian M.; Hirschfeld, P. J. Physical Review B, Vol. 98, Issue 21 https://doi.org/10.1103/physrevb.98.214518	journal	December 2018
Superconductivity in FeSe: The Role of Nematic Order Kang, Jian; Fernandes, Rafael M.; Chubukov, Andrey Physical Review Letters, Vol. 120, Issue 26 https://doi.org/10.1103/physrevlett.120.267001	journal	June 2018
Quantum Vortex Core and Missing Pseudogap in the Multiband BCS-BEC Crossover Superconductor FeSe Hanaguri, T.; Kasahara, S.; Böker, J. Physical Review Letters, Vol. 122, Issue 7 https://doi.org/10.1103/physrevlett.122.077001	journal	February 2019
Evidence for an Fulde-Ferrell-Larkin-Ovchinnikov State with Segmented Vortices in the BCS-BEC-Crossover Superconductor FeSe Kasahara, S.; Sato, Y.; Licciardello, S. Physical Review Letters, Vol. 124, Issue 10 https://doi.org/10.1103/physrevlett.124.107001	journal	March 2020
Nematicity and superconductivity in orthorhombic superconductor N a 0.35 ( C 3 N 2 H 10 ) 0.426 F e 2 S e 2 Fan, Xiao; Deng, Jun; Chen, Hongxiang Physical Review Materials, Vol. 2, Issue 11 https://doi.org/10.1103/physrevmaterials.2.114802	journal	November 2018
Orbital transmutation and the electronic spectrum of FeSe in the nematic phase Christensen, Morten H.; Fernandes, Rafael M.; Chubukov, Andrey V. Physical Review Research, Vol. 2, Issue 1 https://doi.org/10.1103/physrevresearch.2.013015	journal	January 2020
Orbital Origin of Extremely Anisotropic Superconducting Gap in Nematic Phase of FeSe Superconductor Liu, Defa; Li, Cong; Huang, Jianwei Physical Review X, Vol. 8, Issue 3 https://doi.org/10.1103/physrevx.8.031033	journal	August 2018
Probing the reconstructed Fermi surface of antiferromagnetic $BaFe_{2}As_{2}$ in one domain Watson, Matthew D.; Dudin, Pavel; Rhodes, Luke C. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2019-05602	text	January 2019
Nematicity of correlated systems driven by anisotropic chemical phase separation Yuan, Ye; Hübner, René; Birowska, Magdalena arXiv https://doi.org/10.48550/arxiv.1807.05966	text	January 2018
Orbital transmutation and the electronic spectrum of FeSe in the nematic phase Christensen, Morten H.; Fernandes, Rafael M.; Chubukov, Andrey V. arXiv https://doi.org/10.48550/arxiv.1908.04889	text	January 2019

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