FERMI-LIQUID BEHAVIOR AND BCS S-WAVE PAIRING OF K3C60 OBSERVED BY C-13-NMR

被引：28
作者：
SASAKI, S [1 ]
MATSUDA, A [1 ]
CHU, CW [1 ]
机构：
[1] UNIV HOUSTON, DEPT PHYS, HOUSTON, TX 77004 USA
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 05期
关键词：
K3C60; C-13-NMR; CONSTANT-T1T; FERMI LIQUID; HEBEL-SLICHTER PEAK; BCS S-WAVE; ELIASHBERG THEORY; STRONG ELECTRON CORRELATION;
D O I：
10.1143/JPSJ.63.1670
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
This Letter reports on NMR studies of C-13 in K3 C60 above and below T(c) 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 T(c), and a broadened Hebel-Slichter peak observed below T(c) is well explained by the Eliashberg theory with 2DELTA(0)/k(B)T(c)=4.31. The possibility of strong electron correlation and the origin of the multi-exponential recovery are discussed.
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页码：1670 / 1673
页数：4
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