Title: Renormalization group analysis for the quasi-1D superconductor BaFe2S3

Journal Article · · Physical Review B
 [1]; ORCiD logo [2];  [3]
  1. Rutgers Univ., Piscataway, NJ (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Rutgers Univ., Piscataway, NJ (United States); Univ. of London, Surrey (United Kingdom)
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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 tightbinding 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. Furthermore, 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; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
FG02-99ER45790; SC0012704
OSTI ID:
1483243
Report Number(s):
BNL-209474-2018-JAAM
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 18 Vol. 98; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Magnetic states of iron-based two-leg ladder tellurides journal November 2019
Robust block magnetism in the spin ladder compound BaFe 2 Se 3 under hydrostatic pressure journal December 2019
Bandwidth controlled insulator-metal transition in BaFe 2 S 3 : A Mössbauer study under pressure journal January 2019

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Iron based superconductivity