Capping layer influence and isotropic in-plane upper critical field of the superconductivity at the FeSe/SrTiO3 interface

Li, Yanan; Wang, Ziqiao; Xiao, Run; Li, Qi; Wang, Ke; Richardella, Anthony; Wang, Jian; Samarth, Nitin

doi:10.1103/physrevmaterials.5.034802

Title: Capping layer influence and isotropic in-plane upper critical field of the superconductivity at the FeSe / SrTiO 3 interface

Journal Article · Mon Mar 22 00:00:00 EDT 2021 · Physical Review Materials

DOI:https://doi.org/10.1103/physrevmaterials.5.034802· OSTI ID:1849884

Li, Yanan ^[1]; Wang, Ziqiao ^[2]; Xiao, Run ^[2];

^[2]; Wang, Ke ^[3]; Richardella, Anthony ^[4];

^[5];

^[2]

Pennsylvania State Univ., University Park, PA (United States); Peking Univ., Beijing (China). International Center for Quantum Materials
Pennsylvania State Univ., University Park, PA (United States)
Pennsylvania State Univ., University Park, PA (United States). Materials Research Inst.
Pennsylvania State Univ., University Park, PA (United States); Pennsylvania State Univ., University Park, PA (United States). Materials Research Inst.
Peking Univ., Beijing (China). International Center for Quantum Materials

Understanding the superconductivity at the interface of FeSe/SrTiO₃ is a problem of great contemporary interest due to the significant increase in critical temperature (T_c) compared to that of bulk FeSe, as well as the possibility of an unconventional pairing mechanism and topological superconductivity. We report a study of the influence of a capping layer on superconductivity in thin films of FeSe grown on SrTiO₃ using molecular beam epitaxy. We used in vacuo four-probe electrical resistance measurements and ex situ magnetotransport measurements to examine the effect of three capping layers that provide distinct charge transfer into FeSe: insulating FeTe, nonmetallic Te, and metallic Zr. Our results show that FeTe provides an optimal cap that barely influences the inherent T_c found in pristine FeSe/SrTiO₃, while the transfer of holes from a nonmetallic Te cap completely suppresses superconductivity and leads to insulating behavior. Finally, we used ex situ magnetoresistance measurements in FeTe capped FeSe films to extract the angular dependence of the in-plane upper critical magnetic field. Our observations reveal an almost isotropic in-plane upper critical field, providing insight into the symmetry and pairing mechanism of high-temperature superconductivity in FeSe.

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Research Organization:: Pennsylvania State Univ., University Park, PA (United States); Johns Hopkins Univ., Baltimore, MD (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundatoin (NSF0; National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: FG02-08ER46531; SC0019331; DMR-1539916; 11888101

OSTI ID:: 1849884

Journal Information:: Physical Review Materials, Vol. 5, Issue 3; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (39)

Non-equilibrium oxidation states of zirconium during early stages of metal oxidation Ma, Wen; Herbert, F. William; Senanayake, Sanjaya D. Applied Physics Letters, Vol. 106, Issue 10 https://doi.org/10.1063/1.4914180	journal	March 2015
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
Electronic evidence of an insulator–superconductor crossover in single-layer FeSe/SrTiO ₃ films He, Junfeng; Liu, Xu; Zhang, Wenhao Proceedings of the National Academy of Sciences, Vol. 111, Issue 52 https://doi.org/10.1073/pnas.1414094112	journal	December 2014
Superconducting Gap Anisotropy in Monolayer FeSe Thin Film Zhang, Y.; Lee, J. J.; Moore, R. G. Physical Review Letters, Vol. 117, Issue 11 https://doi.org/10.1103/PhysRevLett.117.117001	journal	September 2016
Iron-Based Superconductors as Odd-Parity Superconductors Hu, Jiangping Physical Review X, Vol. 3, Issue 3 https://doi.org/10.1103/PhysRevX.3.031004	journal	July 2013
Fermiology, orbital order, orbital fluctuations, and Cooper pairing in iron-based superconductors Yang, Fan; Wang, Fa; Lee, Dung-Hai Physical Review B, Vol. 88, Issue 10 https://doi.org/10.1103/PhysRevB.88.100504	journal	September 2013
Topological edge states in a high-temperature superconductor FeSe/SrTiO3(001) film Wang, Z. F.; Zhang, Huimin; Liu, Defa Nature Materials, Vol. 15, Issue 9 https://doi.org/10.1038/nmat4686	journal	July 2016
Detection of Bosonic Mode as a Signature of Magnetic Excitation in One-Unit-Cell FeSe on SrTiO ₃ Liu, Chaofei; Wang, Ziqiao; Ye, Shusen Nano Letters, Vol. 19, Issue 6 https://doi.org/10.1021/acs.nanolett.9b00144	journal	May 2019
Superconductivity in the PbO-type structure -FeSe Hsu, F. -C.; Luo, J. -Y.; Yeh, K. -W. Proceedings of the National Academy of Sciences, Vol. 105, Issue 38 https://doi.org/10.1073/pnas.0807325105	journal	September 2008
Atomic line defects and zero-energy end states in monolayer Fe(Te,Se) high-temperature superconductors Chen, Cheng; Jiang, Kun; Zhang, Yi Nature Physics, Vol. 16, Issue 5 https://doi.org/10.1038/s41567-020-0813-0	journal	March 2020
Connection between in-plane upper critical field $H_{c 2}$ and gap symmetry in layered $d$ -wave superconductors Wang, Jing-Rong; Liu, Guo-Zhu; Zhang, Chang-Jin Physical Review B, Vol. 94, Issue 1 https://doi.org/10.1103/PhysRevB.94.014501	journal	July 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
Effect of Fluxoid Quantization on Transitions of Superconducting Films Tinkham, M. Physical Review, Vol. 129, Issue 6 https://doi.org/10.1103/PhysRev.129.2413	journal	March 1963
Superconductivity above 100 K in single-layer FeSe films on doped SrTiO3 Ge, Jian-Feng; Liu, Zhi-Long; Liu, Canhua Nature Materials, Vol. 14, Issue 3 https://doi.org/10.1038/nmat4153	journal	November 2014
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
Interface-Induced High-Temperature Superconductivity in Single Unit-Cell FeSe Films on SrTiO ₃ Wang, Qing-Yan; Li, Zhi; Zhang, Wen-Hao Chinese Physics Letters, Vol. 29, Issue 3 https://doi.org/10.1088/0256-307X/29/3/037402	journal	March 2012
Direct Observation of High-Temperature Superconductivity in One-Unit-Cell FeSe Films Zhang, Wen-Hao; Sun, Yi; Zhang, Jin-Song Chinese Physics Letters, Vol. 31, Issue 1 https://doi.org/10.1088/0256-307X/31/1/017401	journal	January 2014
Tuning the band structure and superconductivity in single-layer FeSe by interface engineering Peng, R.; Xu, H. C.; Tan, S. Y. Nature Communications, Vol. 5, Issue 1 https://doi.org/10.1038/ncomms6044	journal	September 2014
Direct imaging of electron transfer and its influence on superconducting pairing at FeSe/SrTiO ₃ interface Zhao, Weiwei; Li, Mingda; Chang, Cui-Zu Science Advances, Vol. 4, Issue 3 https://doi.org/10.1126/sciadv.aao2682	journal	March 2018
Plain s-wave superconductivity in single-layer FeSe on SrTiO3 probed by scanning tunnelling microscopy Fan, Q.; Zhang, W. H.; Liu, X. Nature Physics, Vol. 11, Issue 11 https://doi.org/10.1038/nphys3450	journal	August 2015
Origin of charge transfer and enhanced electron–phonon coupling in single unit-cell FeSe films on SrTiO3 Zhang, Huimin; Zhang, Ding; Lu, Xiaowei Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/s41467-017-00281-5	journal	August 2017
Resilient Nodeless $d$ -Wave Superconductivity in Monolayer FeSe Agterberg, D. F.; Shishidou, T.; O’Halloran, J. Physical Review Letters, Vol. 119, Issue 26 https://doi.org/10.1103/PhysRevLett.119.267001	journal	December 2017
Zero-energy bound states in the high-temperature superconductors at the two-dimensional limit Liu, Chaofei; Chen, Cheng; Liu, Xiaoqiang Science Advances, Vol. 6, Issue 13 https://doi.org/10.1126/sciadv.aax7547	journal	March 2020
Evidence for d -Wave Superconductivity in Single Layer FeSe/SrTiO ₃ Probed by Quasiparticle Scattering Off Step Edges Ge, Zhuozhi; Yan, Chenhui; Zhang, Huimin Nano Letters, Vol. 19, Issue 4 https://doi.org/10.1021/acs.nanolett.9b00135	journal	March 2019
Superconductivity of the FeSe/SrTiO ₃ Interface in View of BCS–BEC Crossover ^* Zhang, Shuyuan; Miao, Guangyao; Guan, Jiaqi Chinese Physics Letters, Vol. 36, Issue 10 https://doi.org/10.1088/0256-307X/36/10/107404	journal	October 2019
Heterostructural one-unit-cell FeSe/SrTiO ₃ : from high-temperature superconductivity to topological states Liu, Chaofei; Wang, Jian 2D Materials, Vol. 7, Issue 2 https://doi.org/10.1088/2053-1583/ab734b	journal	March 2020
Routes to High-Temperature Superconductivity: A Lesson from FeSe/SrTiO ₃ Lee, Dung-Hai Annual Review of Condensed Matter Physics, Vol. 9, Issue 1 https://doi.org/10.1146/annurev-conmatphys-033117-053942	journal	March 2018
Phase diagram and electronic indication of high-temperature superconductivity at 65 K in single-layer FeSe films He, Shaolong; He, Junfeng; Zhang, Wenhao Nature Materials, Vol. 12, Issue 7 https://doi.org/10.1038/nmat3648	journal	May 2013
Spin fluctuation induced linear magnetoresistance in ultrathin superconducting FeSe films Wang, Qingyan; Zhang, Wenhao; Chen, Weiwei 2D Materials, Vol. 4, Issue 3 https://doi.org/10.1088/2053-1583/aa8165	journal	August 2017
Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor Liu, Defa; Zhang, Wenhao; Mou, Daixiang Nature Communications, Vol. 3, Issue 1 https://doi.org/10.1038/ncomms1946	journal	January 2012
Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3 Lee, J. J.; Schmitt, F. T.; Moore, R. G. Nature, Vol. 515, Issue 7526 https://doi.org/10.1038/nature13894	journal	November 2014
High-temperature superconductivity in one-unit-cell FeSe films Wang, Ziqiao; Liu, Chaofei; Liu, Yi Journal of Physics: Condensed Matter, Vol. 29, Issue 15 https://doi.org/10.1088/1361-648X/aa5f26	journal	March 2017
Evidence of cooperative effect on the enhanced superconducting transition temperature at the FeSe/SrTiO3 interface Song, Q.; Yu, T. L.; Lou, X. Nature Communications, Vol. 10, Issue 1 https://doi.org/10.1038/s41467-019-08560-z	journal	February 2019
Superconductivity without a hole pocket in electron-doped FeSe: Analysis beyond the Migdal-Eliashberg formalism Yamakawa, Youichi; Kontani, Hiroshi Physical Review B, Vol. 96, Issue 4 https://doi.org/10.1103/PhysRevB.96.045130	journal	July 2017
Observation of Discrete Conventional Caroli–de Gennes–Matricon States in the Vortex Core of Single-Layer $FeSe / {SrTiO}_{3}$ Chen, Chen; Liu, Qin; Bao, Wei-Cheng Physical Review Letters, Vol. 124, Issue 9 https://doi.org/10.1103/PhysRevLett.124.097001	journal	March 2020
Effects of Surface Electron Doping and Substrate on the Superconductivity of Epitaxial FeSe Films Zhang, W. H.; Liu, X.; Wen, C. H. P. Nano Letters, Vol. 16, Issue 3 https://doi.org/10.1021/acs.nanolett.5b05243	journal	February 2016
Spectroscopic Imaging of Quasiparticle Bound States Induced by Strong Nonmagnetic Scatterings in One-Unit-Cell $FeSe / {SrTiO}_{3}$ Liu, Chaofei; Wang, Ziqiao; Gao, Yi Physical Review Letters, Vol. 123, Issue 3 https://doi.org/10.1103/PhysRevLett.123.036801	journal	July 2019
Electron pairing in the presence of incipient bands in iron-based superconductors Chen, Xiao; Maiti, S.; Linscheid, A. Physical Review B, Vol. 92, Issue 22 https://doi.org/10.1103/physrevb.92.224514	journal	December 2015
Resilient nodeless $d$-wave superconductivity in monolayer FeSe Agterberg, D. F.; Shishidou, T.; Brydon, P. M. R. arXiv https://doi.org/10.48550/arxiv.1706.01978	text	January 2017

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