Sr_2RuO_4的热电势  

Thermoelectric power of Sr_2RuO_4

作　　者：郑萍[1] 陈兆甲[1] 王楠林[1] 王玉鹏[1] 毛志强[2] Y.Maeno 

机构地区：[1]中国科学院物理研究所极端条件物理实验室,北京100080 [2]Department of Physics,Kyoto University,Kyoto606-8502,Japan

出　　处：《物理学报》2002年第3期655-658,共4页Acta Physica Sinica

摘　　要：Sr2 RuO4是第一个无CuO面的层状强关联氧化物超导体 .测量了 9至 2 6 0K温度范围内Sr2 RuO4的热电势 ,观测到在此温度范围内其热电势为正值 .用两种载流子模型对实验数据进行了拟合 ,并且与Hall系数的实验结果进行了比较 ,发现低温下两种载流子对热电势和Hall系数的贡献比较类似 ,但在高温区空穴对热电势的贡献很大而相应地对Hall系数的贡献不占主要地位 .Sr2RuO4 is the first non-CuO plane layered strong-correlated oxide superconductor. We have measured the thermopower on a Sr2RuO4 single crystal slab. The value keeps to be positive from room temperature to 9K. We used the two-carrier model to analyse the data and found both the electrons and holes have similar effect on the thermopower and Hall effect at low temperatures. But at high temperatures, the thermopower is mainly affected by the holes, which, however. are not the dominated contributor to the Hall effect.

关 键 词：Sr2RuO4 热电势 层状强关联氧化超导体 超导性 载流子模型 钌氧锶化合物 

分 类 号：O511[理学—低温物理]