SUPERCONDUCTIVITY IN GRAPHITE-INTERCALATION COMPOUNDS

被引:46
作者
JISHI, RA
DRESSELHAUS, MS
机构
[1] CALIF STATE UNIV LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90032
[2] MIT,DEPT ELECT ENGN & COMP SCI,CAMBRIDGE,MA 02139
来源
PHYSICAL REVIEW B | 1992年 / 45卷 / 21期
关键词
D O I
10.1103/PhysRevB.45.12465
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Alkali-metal graphite intercalation compounds undergo a normal-to-superconducting transition at a critical temperature T(c) that increases with increasing alkali-metal concentration. Furthermore, the temperature dependence of the critical magnetic field H(c2) is linear down to very low temperatures. A two-band model, which considers coupling between a three-dimensional band and an almost two-dimensional electronic energy band, and which was successfully applied to explain superconductivity in C8K, is used to interpret recently reported data. In particular, we show that the increase in T(c) as the alkali-metal concentration increases, the linear temperature dependence of H(c2), and the anisotropy in its value, are consistent with the two-band model.
引用
收藏
页码:12465 / 12469
页数:5
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