高温超导体Hg0.9Tl0.2Ba2Ca2Cu3O8+δ的热导

1.中国科学技术大学物理系,合肥,230026

2.中国科学技术大学物理系,合肥,230026

3.中国科学技术大学物理系,合肥,230026

4.中科院低温中心,北京,100080

5.中国科学技术大学物理系,合肥,230026

6.中国科学技术大学材料科学及工程系,合肥,230026

THERMAL CONDUCTIVITY OF SUPERCONDUCTING Hg0.9Tl0.2Ba2Ca2Cu3O8+δ

测量了高温超导体Hg0.9Tl0.2Ba2Ca2Cu3O8+δ的热导率,温度范围为20～300K.在超导转变温度Tc以下观察到热导率明显的增加.在65K(～0.5Tc)附近,超导体的热导率达到了一个宽的极大, 热导率的极大值为的1.6倍.用正常态电子散射的模型对实验结果进行了拟合.

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