Abstract
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).
| Original language | English |
|---|---|
| Article number | 187003 |
| Journal | Physical Review Letters |
| Volume | 121 |
| Issue number | 18 |
| DOIs | |
| State | Published - Nov 1 2018 |
| Externally published | Yes |
Funding
We would like to thank Ar. Abanov, K. Haule, K. Stadler, J. VonDelft, and Y. Wu for numerous discussions on the subject of Hund\u2019s metals and superconductivity in the -model. T.-H.\u2009L. and G.\u2009K. were supported by the NSF Grant No. DMR-1733071. A.\u2009C. was supported by the NSF Grant No. DMR-1523036. H.\u2009M. is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Early Career Award Program under Award No. 1047478. T.-H.L. and G.K. were supported by the NSF Grant No. DMR-1733071. A.C. was supported by the NSF Grant No. DMR-1523036. H.M. is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Early Career Award Program under Award No. 1047478.