SYSTEM DEPENDENCE OF THE MAGNETIC-FIELD PENETRATION DEPTH IN C-60 SUPERCONDUCTORS

被引：22

作者：

UEMURA, YJ

KEREN, A

LE, LP

LUKE, GM

WU, WD

TSAI, JS

TANIGAKI, K

HOLCZER, K

DONOVAN, S

WHETTEN, RL

机构：

[1] NEC CORP LTD,FUNDAMENTAL RES LAB,TSUKUBA,IBARAKI 305,JAPAN

[2] UNIV CALIF LOS ANGELES,CTR SOLID STATE SCI,LOS ANGELES,CA 90024

[3] UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1994年 / 235卷

关键词：

D O I：

10.1016/0921-4534(94)92471-6

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have performed muon spin relaxation (mu SR) measurements of the magnetic field penetration depth lambda in Rb3C60, K3C60, and Na2CsC60. In a plot of T-c versus the muon spin relaxation rate sigma(T-->0) proportional to lambda(-2), we observe a monotonic variation, following a roughly linear relation T-c proportional to sigma. Assuming a clean-limit situation, where lambda(-2) proportional to n(s)/m* (carrier density / effective mass), the mu SR results imply a variation T-c proportional to n(s)/m*, opposite to the variation expected in a simple band picture where a decreasing band width(increasing m*) with increasing lattice constant (increasing T-c) would have reduced n(s)/m*.

引用

页码：2501 / 2502

页数：2

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