Cu1-xZnxIr2S4系统的超导电性

低温物理学报 , 2003, 25(z1): 7-10. doi: 10.3969/j.issn.1000-3258.2003.z1.002

Cu1-xZnxIr2S4系统的超导电性

曹光旱 ^1, , 钟鸣 ^2, , 北泽英明 ^3, , 松本武彦 ^4, , 焦正宽 ^5,

1.浙江大学物理系,杭州,310027

2.浙江大学物理系,杭州,310027

3.National Institute for Materials Science, Tsukuba 305-0047, Japan

4.National Institute for Materials Science, Tsukuba 305-0047, Japan

5.浙江大学物理系,杭州,310027

基金项目: 国家自然科学基金(10104012)

SUPERCONDUCTIVITY IN THE Cu1-xZnxIr2S4 SYSTEM

具有常式尖晶石结构的CuIr2S4在约为230K时经历金属-绝缘体一级相变.研究发现,用Zn替代Cu时,系统的基态由绝缘体转变为超导体.本文概述了Cu1-xZnxIr2S4系统的超导参量以及压力效应的实验研究,结果表明该超导体系符合基于电-声作用的BCS超导理论.压力导致的超导体-半导体转变显示出超导Cooper对与小双极化子的竞争,暗示系统具有较强的电-声耦合.

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Cu1-xZnxIr2S4系统的超导电性

SUPERCONDUCTIVITY IN THE Cu1-xZnxIr2S4 SYSTEM

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