Band-dependent superconducting gap in SrFe2(As0.65P0.35)2 studied by angle-resolved photoemission spectroscopy

Suzuki, H.; Kobayashi, T.; Miyasaka, S.; Okazaki, K.; Yoshida, T.; Horio, M.; Ambolode, II, L. C.  C.; Ota, Y.; Yamamoto, H.; Shin, S.; Hashimoto, M.; Lu, D. H.; Shen, Z.-X.; Tajima, S.; Fujimori, A.

doi:10.1038/s41598-019-52887-y

Title: Band-dependent superconducting gap in SrFe₂(As_0.65P_0.35)₂ studied by angle-resolved photoemission spectroscopy

Journal Article · 11 November 2019 · Scientific Reports

DOI: https://doi.org/10.1038/s41598-019-52887-y · OSTI ID:1595720

^[1]; Kobayashi, T. ^[2]; Miyasaka, S. ^[3];

^[4]; Yoshida, T. ^[5];

^[6]; Ambolode, II, L. C. C. ^[6]; Ota, Y. ^[7]; Yamamoto, H. ^[7];

^[8]; Hashimoto, M. ^[9];

^[9];

^[9]; Tajima, S. ^[3]; Fujimori, A. ^[5]

Univ. of Tokyo (Japan). Dept. of Physics; slac
Osaka Univ. (Japan). Dept. of Physics
Osaka Univ. (Japan). Dept. of Physics; JST, Transformative Research-Project on Iron Pnictides (TRIP), Tokyo (Japan)
Univ. of Tokyo (Japan). Dept. of Physics; Univ. of Tokyo, Chiba (Japan). Inst. for Solid State Physics (ISSP)
Univ. of Tokyo (Japan). Dept. of Physics; JST, Transformative Research-Project on Iron Pnictides (TRIP), Tokyo (Japan)
Univ. of Tokyo (Japan). Dept. of Physics
Univ. of Tokyo, Chiba (Japan). Inst. for Solid State Physics (ISSP)
JST, Transformative Research-Project on Iron Pnictides (TRIP), Tokyo (Japan); Univ. of Tokyo, Chiba (Japan). Inst. for Solid State Physics (ISSP)
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)

The isovalent-substituted iron pnictide compound SrFe₂(As_1–xP_x)₂ exhibits multiple evidence for nodal superconductivity via various experimental probes, such as the penetration depth, nuclear magnetic resonance and specific heat measurements. The direct identification of the nodal superconducting (SC) gap structure is challenging, partly because the presence of nodes is not protected by symmetry but instead caused by an accidental sign change of the order parameter, and also because of the three-dimensionality of the electronic structure. We have studied the SC gaps of SrFe₂(As_0.65P_0.35)₂ in three-dimensional momentum space by synchrotron and laser-based angle-resolved photoemission spectroscopy. The three hole Fermi surfaces (FSs) at the zone center have SC gaps with different magnitudes, whereas the SC gaps of the electron FSs at the zone corner are almost isotropic and k_z-independent. As a possible nodal SC gap structure, we propose that the SC gap of the outer hole FS changes sign around the Z-X [(0, 0, 2π) – (π, π, 2π)] direction.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Japan Society for the Promotion of Science (JSPS)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1595720

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 9; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

References (38)

A Common Thread: the pairing interaction for the unconventional superconductors Scalapino, D. J. arXiv https://doi.org/10.48550/arxiv.1207.4093	text	January 2012
The case for dx2 − y2 pairing in the cuprate superconductors Scalapino, D. J. Physics Reports, Vol. 250, Issue 6 https://doi.org/10.1016/0370-1573(94)00086-I	journal	January 1995
Angle-resolved photoemission study on the superconducting iron-pnictides of BaFe2(As,P)2 with low energy photons Shimojima, T.; Sakaguchi, F.; Ishizaka, K. Solid State Communications, Vol. 152, Issue 8 https://doi.org/10.1016/j.ssc.2011.12.032	journal	April 2012
Iron-Based Layered Superconductor La[O _1- _x F _x ]FeAs ( x = 0.05−0.12) with T _c = 26 K Kamihara, Yoichi; Watanabe, Takumi; Hirano, Masahiro Journal of the American Chemical Society, Vol. 130, Issue 11 https://doi.org/10.1021/ja800073m	journal	March 2008
Disorder-induced topological change of the superconducting gap structure in iron pnictides Mizukami, Y.; Konczykowski, M.; Kawamoto, Y. Nature Communications, Vol. 5, Issue 1 https://doi.org/10.1038/ncomms6657	journal	November 2014
Nodal superconducting-gap structure in ferropnictide superconductor BaFe2(As0.7P0.3)2 Zhang, Y.; Ye, Z. R.; Ge, Q. Q. Nature Physics, Vol. 8, Issue 5 https://doi.org/10.1038/nphys2248	journal	March 2012
Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)2 Yoshida, T.; Ideta, S.; Shimojima, T. Scientific Reports, Vol. 4, Issue 1 https://doi.org/10.1038/srep07292	journal	December 2014
Gap symmetry and structure of Fe-based superconductors Hirschfeld, P. J.; Korshunov, M. M.; Mazin, I. I. Reports on Progress in Physics, Vol. 74, Issue 12 https://doi.org/10.1088/0034-4885/74/12/124508	journal	October 2011
Phenomenology of the low-energy spectral function in high- T c superconductors Norman, M. R.; Randeria, M.; Ding, H. Physical Review B, Vol. 57, Issue 18 https://doi.org/10.1103/PhysRevB.57.R11093	journal	May 1998
Pnictogen height as a possible switch between high- T c nodeless and low- T c nodal pairings in the iron-based superconductors Kuroki, Kazuhiko; Usui, Hidetomo; Onari, Seiichiro Physical Review B, Vol. 79, Issue 22 https://doi.org/10.1103/PhysRevB.79.224511	journal	June 2009
P 31 and A 75 s NMR evidence for a residual density of states at zero energy in superconducting BaFe 2 ( As 0.67 P 0.33 ) 2 Nakai, Yusuke; Iye, Tetsuya; Kitagawa, Shunsaku Physical Review B, Vol. 81, Issue 2 https://doi.org/10.1103/PhysRevB.81.020503	journal	January 2010
Evolution from non-Fermi- to Fermi-liquid transport via isovalent doping in BaFe 2 ( As 1 − x P x ) 2 superconductors Kasahara, S.; Shibauchi, T.; Hashimoto, K. Physical Review B, Vol. 81, Issue 18 https://doi.org/10.1103/PhysRevB.81.184519	journal	May 2010
Line nodes in the energy gap of superconducting BaFe 2 ( As 1 − x P x ) 2 single crystals as seen via penetration depth and thermal conductivity Hashimoto, K.; Yamashita, M.; Kasahara, S. Physical Review B, Vol. 81, Issue 22 https://doi.org/10.1103/PhysRevB.81.220501	journal	June 2010
Nodal gap structure of superconducting BaFe 2 (As 1 − x P x ) 2 from angle-resolved thermal conductivity in a magnetic field Yamashita, M.; Senshu, Y.; Shibauchi, T. Physical Review B, Vol. 84, Issue 6 https://doi.org/10.1103/PhysRevB.84.060507	journal	August 2011
Unconventional multiband superconductivity with nodes in single-crystalline SrFe 2 (As 0.65 P 0.35 ) 2 as seen via 31 P NMR and specific heat Dulguun, T.; Mukuda, H.; Kobayashi, T. Physical Review B, Vol. 85, Issue 14 https://doi.org/10.1103/PhysRevB.85.144515	journal	April 2012
Vertical loop nodes in iron-based superconductors Khodas, M.; Chubukov, A. V. Physical Review B, Vol. 86, Issue 14 https://doi.org/10.1103/PhysRevB.86.144519	journal	October 2012
Nodal superconductivity in isovalently substituted SrFe 2 (As 1 − x P x ) 2 pnictide superconductor at the optimal doping x = 0.35 Murphy, J.; Strehlow, C. P.; Cho, K. Physical Review B, Vol. 87, Issue 14 https://doi.org/10.1103/PhysRevB.87.140505	journal	April 2013
s + i s state with broken time-reversal symmetry in Fe-based superconductors Maiti, Saurabh; Chubukov, Andrey V. Physical Review B, Vol. 87, Issue 14 https://doi.org/10.1103/PhysRevB.87.144511	journal	April 2013
Change of electronic state and crystal structure by postannealing in superconducting SrFe 2 ( As 0 . 65 P 0 . 35 ) 2 Kobayashi, T.; Miyasaka, S.; Tajima, S. Physical Review B, Vol. 87, Issue 17 https://doi.org/10.1103/PhysRevB.87.174520	journal	May 2013
Nodal gap structure in Fe-based superconductors due to the competition between orbital and spin fluctuations Saito, Tetsuro; Onari, Seiichiro; Kontani, Hiroshi Physical Review B, Vol. 88, Issue 4 https://doi.org/10.1103/PhysRevB.88.045115	journal	July 2013
Strongly three-dimensional electronic structure and Fermi surfaces of SrFe 2 ( As 0.65 P 0.35 ) 2 : Comparison with BaFe 2 ( As 1 − x P x ) 2 Suzuki, H.; Kobayashi, T.; Miyasaka, S. Physical Review B, Vol. 89, Issue 18 https://doi.org/10.1103/PhysRevB.89.184513	journal	May 2014
Comparative study of the effects of electron irradiation and natural disorder in single crystals of SrFe 2 ( As 1 − x P x ) 2 superconductor ( x = 0.35 ) Strehlow, C. P.; Kończykowski, M.; Murphy, J. A. Physical Review B, Vol. 90, Issue 2 https://doi.org/10.1103/PhysRevB.90.020508	journal	July 2014
Distinguishing between s + i d and s + i s pairing symmetries in multiband superconductors through spontaneous magnetization pattern induced by a defect Lin, Shi-Zeng; Maiti, Saurabh; Chubukov, Andrey Physical Review B, Vol. 94, Issue 6 https://doi.org/10.1103/PhysRevB.94.064519	journal	August 2016
Unconventional Superconductivity with a Sign Reversal in the Order Parameter of LaFeAsO 1 − x F x Mazin, I. I.; Singh, D. J.; Johannes, M. D. Physical Review Letters, Vol. 101, Issue 5 https://doi.org/10.1103/PhysRevLett.101.057003	journal	July 2008
Unconventional Pairing Originating from the Disconnected Fermi Surfaces of Superconducting LaFeAsO 1 − x F x Kuroki, Kazuhiko; Onari, Seiichiro; Arita, Ryotaro Physical Review Letters, Vol. 101, Issue 8 https://doi.org/10.1103/PhysRevLett.101.087004	journal	August 2008
Orbital-Fluctuation-Mediated Superconductivity in Iron Pnictides: Analysis of the Five-Orbital Hubbard-Holstein Model Kontani, Hiroshi; Onari, Seiichiro Physical Review Letters, Vol. 104, Issue 15 https://doi.org/10.1103/PhysRevLett.104.157001	journal	April 2010
Exotic d -Wave Superconducting State of Strongly Hole-Doped K x Ba 1 − x Fe 2 As 2 Thomale, Ronny; Platt, Christian; Hanke, Werner Physical Review Letters, Vol. 107, Issue 11 https://doi.org/10.1103/PhysRevLett.107.117001	journal	September 2011
Self-consistent Vertex Correction Analysis for Iron-based Superconductors: Mechanism of Coulomb Interaction-Driven Orbital Fluctuations Onari, Seiichiro; Kontani, Hiroshi Physical Review Letters, Vol. 109, Issue 13 https://doi.org/10.1103/PhysRevLett.109.137001	journal	September 2012
A common thread: The pairing interaction for unconventional superconductors Scalapino, D. J. Reviews of Modern Physics, Vol. 84, Issue 4 https://doi.org/10.1103/RevModPhys.84.1383	journal	October 2012
Orbital-Independent Superconducting Gaps in Iron Pnictides Shimojima, T.; Sakaguchi, F.; Ishizaka, K. Science, Vol. 332, Issue 6029 https://doi.org/10.1126/science.1202150	journal	April 2011
Possible Three-Dimensional Nodes in the s ± Superconducting Gap of BaFe ₂ (As _{1- x} P _x ) ₂ Suzuki, Katsuhiro; Usui, Hidetomo; Kuroki, Kazuhiko Journal of the Physical Society of Japan, Vol. 80, Issue 1 https://doi.org/10.1143/JPSJ.80.013710	journal	January 2011
Pairing Mechanism in Fe-Based Superconductors Chubukov, Andrey Annual Review of Condensed Matter Physics, Vol. 3, Issue 1 https://doi.org/10.1146/annurev-conmatphys-020911-125055	journal	March 2012
Vertical loop nodes in iron-based superconductors Khodas, M.; Chubukov, A. V. arXiv https://doi.org/10.48550/arxiv.1209.5139	text	January 2012
Nodal superconductivity in isovalently substituted SrFe$_2$(As$_{1-x}$P$_{x}$)$_2$ pnictide superconductor at the optimal doping, $x=$0.35 Murphy, J.; Strehlow, C. P.; Cho, K. arXiv https://doi.org/10.48550/arxiv.1301.5622	text	January 2013
s+is State with Broken Time Reversal Symmetry in Fe-Based Superconductors Maiti, Saurabh; Chubukov, Andrey V. arXiv https://doi.org/10.48550/arxiv.1302.2964	text	January 2013
Disorder-induced topological change of the superconducting gap structure in iron pnictides Mizukami, Y.; Konczykowski, M.; Kawamoto, Y. arXiv https://doi.org/10.48550/arxiv.1405.6951	text	January 2014
Electronic Phase Diagram of SrFe$_2$(As$_{1-x}$P$_x$)$_2$: Effect of Structural Dimensionality Kobayashi, Tatsuya; Miyasaka, Shigeki; Tajima, Setsuko arXiv https://doi.org/10.48550/arxiv.1408.1531	text	January 2014
Electronic Phase Diagram of SrFe ₂ (As ₁₋ _x P _x ) ₂ : Effect of Structural Dimensionality Kobayashi, Tatsuya; Miyasaka, Shigeki; Tajima, Setsuko Journal of the Physical Society of Japan, Vol. 83, Issue 10 https://doi.org/10.7566/JPSJ.83.104702	journal	October 2014

Similar Records

Unusual nodal behaviors of the superconducting gap in the iron-based superconductor

Ba (F e_{0.65} R u_{0.35})_{2} A s_{2}

: Effects of spin-orbit coupling

Journal Article · 2017 · Physical Review B · OSTI ID:1353209

Liu, L.; Okazaki, K.; Yoshida, T.; +22 more

Sensitivity of the superconducting state and magnetic susceptibility to key aspects of electronic structure in ferropnictides

Journal Article · 2010 · New Journal of Physics · OSTI ID:2484127

Kemper, A. F.; Maier, T. A.; Graser, S.; +3 more

Spin fluctuations and superconductivity in a three-dimensional tight-binding model for BaFe₂⁢As₂

Journal Article · 2010 · Physical Review. B, Condensed Matter and Materials Physics · OSTI ID:2484126

Graser, S.; Kemper, A. F.; Maier, T. A.; +3 more

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Electronic properties and materials
Superconducting properties and materials

Title: Band-dependent superconducting gap in SrFe2(As0.65P0.35)2 studied by angle-resolved photoemission spectroscopy

Citation Formats

References (38)

Similar Records

Related Subjects

Title: Band-dependent superconducting gap in SrFe₂(As_0.65P_0.35)₂ studied by angle-resolved photoemission spectroscopy