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Title: Renormalization group analysis for the quasi-1D superconductor BaFe 2S 3

Abstract

Motivated by the discovery of superconductivity in the two-leg, quasi-one dimensional ladder compound, BaFe 2S 3 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.

Authors:
 [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)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1483243
Alternate Identifier(s):
OSTI ID: 1483453
Report Number(s):
BNL-209474-2018-JAAM
Journal ID: ISSN 2469-9950
Grant/Contract Number:  
SC0012704; FG02-99ER45790
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 18; 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

Konig, Elio J., Tsvelik, Alexei M., and Coleman, Piers. Renormalization group analysis for the quasi-1D superconductor BaFe2S3. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.98.184517.
Konig, Elio J., Tsvelik, Alexei M., & Coleman, Piers. Renormalization group analysis for the quasi-1D superconductor BaFe2S3. United States. doi:10.1103/PhysRevB.98.184517.
Konig, Elio J., Tsvelik, Alexei M., and Coleman, Piers. Tue . "Renormalization group analysis for the quasi-1D superconductor BaFe2S3". United States. doi:10.1103/PhysRevB.98.184517.
@article{osti_1483243,
title = {Renormalization group analysis for the quasi-1D superconductor BaFe2S3},
author = {Konig, Elio J. and Tsvelik, Alexei M. and Coleman, Piers},
abstractNote = {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.},
doi = {10.1103/PhysRevB.98.184517},
journal = {Physical Review B},
number = 18,
volume = 98,
place = {United States},
year = {Tue Nov 27 00:00:00 EST 2018},
month = {Tue Nov 27 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
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