Orbital selective pairing and gap structures of iron-based superconductors
Abstract
We discuss the in uence on spin-fluctuation pairing theory of orbital selective strong correlation effects in Fe-based superconductors, particularly Fe chalcogenide systems. We propose that a key ingredient for an improved itinerant pairing theory is orbital selectivity, i.e., incorporating the reduced coherence of quasiparticles occupying specific orbital states. This modifies the usual spin-fluctuation via suppression of pair scattering processes involving those less coherent states and results in orbital selective Cooper pairing of electrons in the remaining states. We show that this paradigm yields remarkably good agreement with the experimentally observed anisotropic gap structures in both bulk and monolayer FeSe, as well as LiFeAs, indicating that orbital selective Cooper pairing plays a key role in the more strongly correlated iron-based superconductors.
- Authors:
-
- Univ. of Copenhagen (Denmark). The Niels Bohr Inst.; Univ. Leipzig (Germany)
- Univ. of Copenhagen (Denmark). The Niels Bohr Inst.
- Cornell Univ., Ithaca, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. of Florida, Gainesville, FL (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1412747
- Alternate Identifier(s):
- OSTI ID: 1355955
- Report Number(s):
- BNL-114709-2017-JA
Journal ID: ISSN 2469-9950; PRBMDO; R&D Project: PM015; KC0207010; TRN: US1800340
- Grant/Contract Number:
- SC0012704; FG02-05ER46236; 2009-BNL-PM015
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 17; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Kreisel, Andreas, Andersen, Brian M., Sprau, P. O., Kostin, A., Davis, J. C. Séamus, and Hirschfeld, P. J. Orbital selective pairing and gap structures of iron-based superconductors. United States: N. p., 2017.
Web. doi:10.1103/PhysRevB.95.174504.
Kreisel, Andreas, Andersen, Brian M., Sprau, P. O., Kostin, A., Davis, J. C. Séamus, & Hirschfeld, P. J. Orbital selective pairing and gap structures of iron-based superconductors. United States. https://doi.org/10.1103/PhysRevB.95.174504
Kreisel, Andreas, Andersen, Brian M., Sprau, P. O., Kostin, A., Davis, J. C. Séamus, and Hirschfeld, P. J. Mon .
"Orbital selective pairing and gap structures of iron-based superconductors". United States. https://doi.org/10.1103/PhysRevB.95.174504. https://www.osti.gov/servlets/purl/1412747.
@article{osti_1412747,
title = {Orbital selective pairing and gap structures of iron-based superconductors},
author = {Kreisel, Andreas and Andersen, Brian M. and Sprau, P. O. and Kostin, A. and Davis, J. C. Séamus and Hirschfeld, P. J.},
abstractNote = {We discuss the in uence on spin-fluctuation pairing theory of orbital selective strong correlation effects in Fe-based superconductors, particularly Fe chalcogenide systems. We propose that a key ingredient for an improved itinerant pairing theory is orbital selectivity, i.e., incorporating the reduced coherence of quasiparticles occupying specific orbital states. This modifies the usual spin-fluctuation via suppression of pair scattering processes involving those less coherent states and results in orbital selective Cooper pairing of electrons in the remaining states. We show that this paradigm yields remarkably good agreement with the experimentally observed anisotropic gap structures in both bulk and monolayer FeSe, as well as LiFeAs, indicating that orbital selective Cooper pairing plays a key role in the more strongly correlated iron-based superconductors.},
doi = {10.1103/PhysRevB.95.174504},
journal = {Physical Review B},
number = 17,
volume = 95,
place = {United States},
year = {Mon May 08 00:00:00 EDT 2017},
month = {Mon May 08 00:00:00 EDT 2017}
}
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