Fermi-Liquid Behavior and BCS s-Wave Pairing of K3C60 Observed by 13C-NMR

Susumu Sasaki; Azusa Matsuda; C. W. Chu

doi:10.1143/JPSJ.63.1670

Fermi-Liquid Behavior and BCS s-Wave Pairing of K₃C₆₀ Observed by ¹³C-NMR

Susumu Sasaki, Azusa Matsuda, C. W. Chu

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

23 Citations (Scopus)

Abstract

This Letter reports on NMR studies of 13C in K3 C60 above and below Tc with an applied field of 2.93 T. It is found that non-single-exponential recovery data can be fitted by two components and normalized to an identical shape. With T1 defined in this way, Fermi-liquid behavior is identified above Tc, and a broadened Hebel-Slichter peak observed below Tc is well explained by the Eliashberg theory with 2Δ(0) /kBTc=4.31. The possibility of strong electron correlation and the origin of the multi-exponential recovery are discussed.

Original language	English
Pages (from-to)	1670-1673
Number of pages	4
Journal	journal of the physical society of japan
Volume	63
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.63.1670
Publication status	Published - 1994
Externally published	Yes

Keywords

BCS s-wave
C-NMR
Eliashberg theory
Fermi liquid
Hebel-Slichter peak
KC
constant-T T
strong electron correlation

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.63.1670

Cite this

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title = "Fermi-Liquid Behavior and BCS s-Wave Pairing of K3C60 Observed by 13C-NMR",

abstract = "This Letter reports on NMR studies of 13C in K3 C60 above and below Tc with an applied field of 2.93 T. It is found that non-single-exponential recovery data can be fitted by two components and normalized to an identical shape. With T1 defined in this way, Fermi-liquid behavior is identified above Tc, and a broadened Hebel-Slichter peak observed below Tc is well explained by the Eliashberg theory with 2Δ(0) /kBTc=4.31. The possibility of strong electron correlation and the origin of the multi-exponential recovery are discussed.",

keywords = "BCS s-wave, C-NMR, Eliashberg theory, Fermi liquid, Hebel-Slichter peak, KC, constant-T T, strong electron correlation",

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year = "1994",

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T1 - Fermi-Liquid Behavior and BCS s-Wave Pairing of K3C60 Observed by 13C-NMR

AU - Sasaki, Susumu

AU - Matsuda, Azusa

AU - Chu, C. W.

PY - 1994

Y1 - 1994

N2 - This Letter reports on NMR studies of 13C in K3 C60 above and below Tc with an applied field of 2.93 T. It is found that non-single-exponential recovery data can be fitted by two components and normalized to an identical shape. With T1 defined in this way, Fermi-liquid behavior is identified above Tc, and a broadened Hebel-Slichter peak observed below Tc is well explained by the Eliashberg theory with 2Δ(0) /kBTc=4.31. The possibility of strong electron correlation and the origin of the multi-exponential recovery are discussed.

AB - This Letter reports on NMR studies of 13C in K3 C60 above and below Tc with an applied field of 2.93 T. It is found that non-single-exponential recovery data can be fitted by two components and normalized to an identical shape. With T1 defined in this way, Fermi-liquid behavior is identified above Tc, and a broadened Hebel-Slichter peak observed below Tc is well explained by the Eliashberg theory with 2Δ(0) /kBTc=4.31. The possibility of strong electron correlation and the origin of the multi-exponential recovery are discussed.

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KW - C-NMR

KW - Eliashberg theory

KW - Fermi liquid

KW - Hebel-Slichter peak

KW - KC

KW - constant-T T

KW - strong electron correlation

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