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  Influence of Spin-Orbit Coupling in Iron-Based Superconductors

Day, R. P., Levy, G., Michiardi, M., Zwartsenberg, B., Zonno, M., Ji, F., et al. (2018). Influence of Spin-Orbit Coupling in Iron-Based Superconductors. Physical Review Letters, 121(7): 076401, pp. 1-5. doi:10.1103/PhysRevLett.121.076401.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-11FC-F Version Permalink: http://hdl.handle.net/21.11116/0000-0002-182E-1
Genre: Journal Article

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 Creators:
Day, R. P.1, Author
Levy, G.1, Author
Michiardi, M.2, Author              
Zwartsenberg, B.1, Author
Zonno, M.1, Author
Ji, F.1, Author
Razzoli, E.1, Author
Boschini, F.1, Author
Chi, S.1, Author
Liang, R.1, Author
Das, P. K.1, Author
Vobornik, I.1, Author
Fujii, J.1, Author
Hardy, W. N.1, Author
Bonn, D. A.1, Author
Elfimov, I. S.1, Author
Damascelli, A.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              

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 Abstract: We report on the influence of spin-orbit coupling (SOC) in Fe-based superconductors via application of circularly polarized spin and angle-resolved photoemission spectroscopy. We combine this technique in representative members of both the Fe-pnictides (LiFeAs) and Fe-chalcogenides (FeSe) with tight-binding calculations to establish an ubiquitous modification of the electronic structure in these materials imbued by SOC. At low energy, the influence of SOC is found to be concentrated on the hole pockets, where the largest superconducting gaps are typically found. This effect varies substantively with the k(z) dispersion, and in FeSe we find SOC to be comparable to the energy scale of orbital order. These results contest descriptions of superconductivity in these materials in terms of pure spin-singlet eigenstates, raising questions regarding the possible pairing mechanisms and role of SOC therein.

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Language(s): eng - English
 Dates: 2018-08-172018-08-17
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 121 (7) Sequence Number: 076401 Start / End Page: 1 - 5 Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1