COHERENCE PEAK AND SUPERCONDUCTING ENERGY-GAP IN RB3C60 OBSERVED BY MUON SPIN RELAXATION

被引：76

作者：

KIEFL, RF

MACFARLANE, WA

CHOW, KH

DUNSIGER, S

DUTY, TL

JOHNSTON, TMS

SCHNEIDER, JW

SONIER, J

BRARD, L

STRONGIN, RM

FISCHER, JE

SMITH, AB

机构：

[1] UNIV BRITISH COLUMBIA,CANADIAN INST ADV RES,VANCOUVER V6T 2A6,BC,CANADA

[2] UNIV PENN,RES STRUCT MATTER LAB,PHILADELPHIA,PA 19104

[3] UNIV PENN,DEPT MAT SCI,PHILADELPHIA,PA 19104

[4] UNIV PENN,DEPT CHEM,PHILADELPHIA,PA 19104

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.70.3987

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Muon spin relaxation resulting from spin exchange scattering of endohedral muonium (mu+ e-) with thermal electronic excitations has been observed in the fullerene superconductor Rb3C60. The temperature dependence of T1(-1) shows a coherence peak just below T(c) and can be fit to the conventional Hebel-Slichter theory for spin relaxation in a superconductor with a broadened BCS density of states. The average energy gap for electronic excitations, DELTA/k(B)=53(4) K or 2DELTA/k(B)T(c)=3.6(3), is consistent with the BCS weak-coupling limit.

引用

页码：3987 / 3990

页数：4

共 27 条

[1] PHONON SUPPRESSION OF COHERENCE PEAK IN NUCLEAR-SPIN RELAXATION RATE OF SUPERCONDUCTORS [J].