Spin-Orbit Interactions and the Nematicity Observed in the Fe-Based Superconductors

Johnson, P. D.; Yang, H.-B.; Rameau, J. D.; Gu, G. D.; Pan, Z.-H.; Valla, T.; Weinert, M.; Fedorov, A. V.

doi:10.1103/PhysRevLett.114.167001

Title: Spin-Orbit Interactions and the Nematicity Observed in the Fe-Based Superconductors

Journal Article · Thu Apr 23 00:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.114.167001· OSTI ID:1385496

Johnson, P. D. ^[1]; Yang, H.-B. ^[1]; Rameau, J. D. ^[1]; Gu, G. D. ^[1]; Pan, Z.-H. ^[1]; Valla, T. ^[1]; Weinert, M. ^[2]; Fedorov, A. V. ^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Univ. of Wisconsin, Milwaukee, WI (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

High-resolution angle-resolved photoelectron spectroscopy is used herein to examine the electronic band structure of ${FeTe}_{0.5} {Se}_{0.5}$ near the Brillouin zone center. A consistent separation of the $α_{1}$ and $α_{2}$ bands is observed with little $k_{z}$ dependence of the $α_{1}$ band. First-principles calculations for bulk and thin films demonstrate that the antiferromagnetic coupling between the Fe atoms and hybridization-induced spin-orbit effects lifts the degeneracy of the Fe $d_{x z}$ and $d_{y z}$ orbitals at the zone center leading to orbital ordering. These experimental and computational results provide a natural microscopic basis for the nematicity observed in the Fe-based superconductors.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Grant/Contract Number:: AC02-98CH10886; DMR-1335215

OSTI ID:: 1385496

Alternate ID(s):: OSTI ID: 1178595

Journal Information:: Physical Review Letters, Vol. 114, Issue 16; Related Information: CES partners with Brookhaven National Laboratory (BNL); Argonne National Laboratory; University of Illinois, Urbana-Champaign; Los Alamos National Laboratory; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 37 works

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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
Preferred Magnetic Excitations in the Iron-Based ${Sr}_{1 - x} {Na}_{x} {Fe}_{2} {As}_{2}$ Superconductor Guo, Jianqing; Yue, Li; Iida, Kazuki Physical Review Letters, Vol. 122, Issue 1 https://doi.org/10.1103/physrevlett.122.017001	journal	January 2019
Observation of topological superconductivity on the surface of an iron-based superconductor Zhang, Peng; Yaji, Koichiro; Hashimoto, Takahiro Science, Vol. 360, Issue 6385 https://doi.org/10.1126/science.aan4596	journal	March 2018
High-temperature superconductivity in one-unit-cell FeSe films Wang, Ziqiao; Liu, Chaofei; Liu, Yi arXiv https://doi.org/10.48550/arxiv.1701.06855	text	January 2017
Observation of topological superconductivity on the surface of an iron-based superconductor Zhang, Peng; Yaji, Koichiro; Hashimoto, Takahiro arXiv https://doi.org/10.48550/arxiv.1706.05163	text	January 2017
Influence of Spin Orbit Coupling in the Iron-Based Superconductors Day, R. P.; Levy, G.; Michiardi, M. arXiv https://doi.org/10.48550/arxiv.1711.06686	text	January 2017

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