Renormalization group analysis for the quasi-1D superconductor BaFe2S3
- Rutgers Univ., Piscataway, NJ (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Rutgers Univ., Piscataway, NJ (United States); Univ. of London, Surrey (United Kingdom)
Motivated by the discovery of superconductivity in the two-leg, quasi-one-dimensional ladder compound BaFe2S3, we present a renormalization group study of electrons moving on a two-leg, two-orbital ladder, subjected to Hubbard repulsion U and Hund's coupling J. In our calculations, we adopt tight-binding parameters obtained from ab initio studies on this material. At incommensurate filling, the long-wavelength analysis displays four phases as a function of 0 ≤ J/U < 1. We show that a fully gapped superconductor is stabilized at sufficiently large Hund's coupling, the relative phases at the three Fermi points are “+,-,-”. By contrast, when the system is tuned to half-filling, Umklapp scattering gives rise to Mott insulating phases. We discuss the general implications of our study for the broad class of iron-based superconductors.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Rutgers Univ., Piscataway, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704; FG02-99ER45790
- OSTI ID:
- 1483243
- Alternate ID(s):
- OSTI ID: 1483453; OSTI ID: 1509946
- Report Number(s):
- BNL-209474-2018-JAAM
- Journal Information:
- Physical Review B, Vol. 98, Issue 18; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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