WEAK LOCALIZATION, FLUCTUATION, AND SUPERCONDUCTIVITY IN THIN NB FILMS AND WIRES

被引：21

作者：

HIKITA, M ^{[1
]}

TAJIMA, Y ^{[1
]}

TAMAMURA, T ^{[1
]}

KURIHARA, S ^{[1
]}

机构：

[1] NIPPON TELEGRAPH & TEL PUBL CORP, MUSASHINO ELECT COMMUN LAB, BASIC RES LABS, MUSASHINO, TOKYO 180, JAPAN

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.42.118

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Weak localization, fluctuation conductivity, and related problems have been investigated based on a comprehensive set of experiments on transition metal Nb films and wires. The temperature dependence of the inelastic scattering rate 1/ of films with various thicknesses (25 80), estimated from magnetoresistance data above Tc, is well fitted to a function of C0+C1T+C3T3. The coefficient C1 is in excellent quantitative agreement with the theoretical prediction of the electron-electron scattering mechanism for two-dimensional dirty metals. The coefficient C3 shows no thickness dependence and is in semiquantitative agreement with theories of three-dimensional electron-phonon scattering mechanisms. The upper critical field of thin Nb wires with a width of less than 1000 exhibits unconventional temperature dependence close to Tc. We also discuss this behavior. © 1990 The American Physical Society.

引用

页码：118 / 126

页数：9