Hund's superconductor Li(Fe,Co)As

H. Miao; Y. L. Wang; J. X. Yin; J. Zhang; S. Zhang; M. Z. Hasan; R. Yang; X. C. Wang; C. Q. Jin; T. Qian; H. Ding; H. N. Lee; G. Kotliar

doi:10.1103/PhysRevB.103.054503

Hund's superconductor Li(Fe,Co)As

H. Miao, Y. L. Wang, J. X. Yin, J. Zhang, S. Zhang, M. Z. Hasan, R. Yang, X. C. Wang, C. Q. Jin, T. Qian, H. Ding, H. N. Lee, G. Kotliar

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We combine transport, angle-resolved photoemission spectroscopy, and scanning tunneling spectroscopy to investigate several low-energy manifestations of the Hund's coupling in a canonical FeSC family Li(Fe,Co)As. We determine the doping dependence of the coherent-incoherent crossover temperature and the quasiparticle effective mass enhancement in the normal state. Our tunneling spectroscopy result in the superconducting state supports the idea that superconductivity emerging from Hund's metal state displays a universal maximal superconducting gap vs transition temperature (2Δmax/kBTc) value, which is independent of doping level and Tc.

Original language	English (US)
Article number	054503
Journal	Physical Review B
Volume	103
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.103.054503
State	Published - Feb 10 2021

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.103.054503

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title = "Hund's superconductor Li(Fe,Co)As",

abstract = "We combine transport, angle-resolved photoemission spectroscopy, and scanning tunneling spectroscopy to investigate several low-energy manifestations of the Hund's coupling in a canonical FeSC family Li(Fe,Co)As. We determine the doping dependence of the coherent-incoherent crossover temperature and the quasiparticle effective mass enhancement in the normal state. Our tunneling spectroscopy result in the superconducting state supports the idea that superconductivity emerging from Hund's metal state displays a universal maximal superconducting gap vs transition temperature (2Δmax/kBTc) value, which is independent of doping level and Tc.",

author = "H. Miao and Wang, {Y. L.} and Yin, {J. X.} and J. Zhang and S. Zhang and Hasan, {M. Z.} and R. Yang and Wang, {X. C.} and Jin, {C. Q.} and T. Qian and H. Ding and Lee, {H. N.} and G. Kotliar",

note = "Publisher Copyright: {\textcopyright} 2021 American Physical Society.",

year = "2021",

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day = "10",

doi = "10.1103/PhysRevB.103.054503",

language = "English (US)",

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TY - JOUR

T1 - Hund's superconductor Li(Fe,Co)As

AU - Miao, H.

AU - Wang, Y. L.

AU - Yin, J. X.

AU - Zhang, J.

AU - Zhang, S.

AU - Hasan, M. Z.

AU - Yang, R.

AU - Wang, X. C.

AU - Jin, C. Q.

AU - Qian, T.

AU - Ding, H.

AU - Lee, H. N.

AU - Kotliar, G.

PY - 2021/2/10

Y1 - 2021/2/10

N2 - We combine transport, angle-resolved photoemission spectroscopy, and scanning tunneling spectroscopy to investigate several low-energy manifestations of the Hund's coupling in a canonical FeSC family Li(Fe,Co)As. We determine the doping dependence of the coherent-incoherent crossover temperature and the quasiparticle effective mass enhancement in the normal state. Our tunneling spectroscopy result in the superconducting state supports the idea that superconductivity emerging from Hund's metal state displays a universal maximal superconducting gap vs transition temperature (2Δmax/kBTc) value, which is independent of doping level and Tc.

AB - We combine transport, angle-resolved photoemission spectroscopy, and scanning tunneling spectroscopy to investigate several low-energy manifestations of the Hund's coupling in a canonical FeSC family Li(Fe,Co)As. We determine the doping dependence of the coherent-incoherent crossover temperature and the quasiparticle effective mass enhancement in the normal state. Our tunneling spectroscopy result in the superconducting state supports the idea that superconductivity emerging from Hund's metal state displays a universal maximal superconducting gap vs transition temperature (2Δmax/kBTc) value, which is independent of doping level and Tc.

UR - http://www.scopus.com/inward/record.url?scp=85100657249&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevB.103.054503

DO - 10.1103/PhysRevB.103.054503

M3 - Article

AN - SCOPUS:85100657249

SN - 2469-9950

VL - 103

JO - Physical Review B

JF - Physical Review B

IS - 5

M1 - 054503

ER -

Hund's superconductor Li(Fe,Co)As

Abstract

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