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Title: Pairing Mechanism in Hund’s Metal Superconductors and the Universality of the Superconducting Gap to Critical Temperature Ratio

Abstract

Here, we analyze a simple model containing the physical ingredients of a Hund’s metal, the local spin fluctuations with power-law correlators, (Ω 0/|Ω|) γ, with γ greater than one, interacting with electronic quasiparticles. While the critical temperature and the gap change significantly with varying parameters, the 2Δ max/k BT c remains close to twice the BCS value in agreement with experimental observations in the iron-based superconductors (FeSC).

Authors:
 [1];  [2]; ORCiD logo [3];  [4]
  1. Rutgers Univ., Piscataway, NJ (United States)
  2. Univ. of Minnesota, Minneapolis, MN (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Rutgers Univ., Piscataway, NJ (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
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:
1482564
Alternate Identifier(s):
OSTI ID: 1480371
Report Number(s):
BNL-209463-2018-JAAM
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
SC0012704; 1047478
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 121; Journal Issue: 18; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Lee, Tsung -Han, Chubukov, Andrey, Miao, Hu, and Kotliar, Gabriel. Pairing Mechanism in Hund’s Metal Superconductors and the Universality of the Superconducting Gap to Critical Temperature Ratio. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.121.187003.
Lee, Tsung -Han, Chubukov, Andrey, Miao, Hu, & Kotliar, Gabriel. Pairing Mechanism in Hund’s Metal Superconductors and the Universality of the Superconducting Gap to Critical Temperature Ratio. United States. doi:10.1103/PhysRevLett.121.187003.
Lee, Tsung -Han, Chubukov, Andrey, Miao, Hu, and Kotliar, Gabriel. Thu . "Pairing Mechanism in Hund’s Metal Superconductors and the Universality of the Superconducting Gap to Critical Temperature Ratio". United States. doi:10.1103/PhysRevLett.121.187003.
@article{osti_1482564,
title = {Pairing Mechanism in Hund’s Metal Superconductors and the Universality of the Superconducting Gap to Critical Temperature Ratio},
author = {Lee, Tsung -Han and Chubukov, Andrey and Miao, Hu and Kotliar, Gabriel},
abstractNote = {Here, we analyze a simple model containing the physical ingredients of a Hund’s metal, the local spin fluctuations with power-law correlators, (Ω0/|Ω|)γ, with γ greater than one, interacting with electronic quasiparticles. While the critical temperature and the gap change significantly with varying parameters, the 2Δmax/kBTc remains close to twice the BCS value in agreement with experimental observations in the iron-based superconductors (FeSC).},
doi = {10.1103/PhysRevLett.121.187003},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 18,
volume = 121,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
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