Superconductivity in silicon based barium-inclusion clathrates

被引：45
|
作者：
Herrmann, RFW
Tanigaki, K
Kuroshima, S
Suematsu, H
机构：
[1] NEC, Fundamental Res Labs, Tsukuba, Ibaraki 305, Japan
[2] Univ Tokyo, Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 113, Japan
来源：
CHEMICAL PHYSICS LETTERS | 1998年 / 283卷 / 1-2期
基金：
日本学术振兴会;
关键词：
D O I：
10.1016/S0009-2614(97)01324-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Clathrates of type Ba8TMxSi46-x (with TM = Au, Ag, Cu) have been investigated. We report on superconductivity in Ba-inclusion silicon based clathrates when doped with transition metals. It is clarified that the transition metals an necessary in order to form the clathrates as major phases, but they destroy the superconductivity. On lowering the amount of TM, an increase in superconducting fraction has been observed, with a maximum at x approximate to 1. After purification a superconducting fraction of up to 50% was obtained. The critical temperatures range from 5 to 6 K depending on both, x and the type of TM. (C) 1998 Elsevier Science B.V.
引用
收藏
页码：29 / 32
页数：4
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