DIELECTRIC RESPONSE OF LA2CUO4 AND EUBA2CU3O6

被引:3
作者
REAGOR, D
MIGLIORI, A
CHEONG, SW
FISK, Z
机构
[1] Los Alamos National Laboratory, Los Alamos, NM
来源
PHYSICA B | 1990年 / 163卷 / 1-3期
关键词
D O I
10.1016/0921-4526(90)90187-Y
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We have measured the dielectric constant, ε{lunate}, in the semiconductors La2CuO4+x and EuBa2Cu3O6+x. In both cases the crystals are grown by standard techniques and annealed in inert gases, which leads to a semiconductor with x{all equal to}0, whereas an oxygen anneal produces a superconductor. We have shown earlier that these results are intrinsic to La2CuO4 by measuring the temperature dependence of ε{lunate} at high frequencies. The intrinsic values are ε{lunate} = 23 for the c-axis of both materials, ε{lunate} = 45 in the a-b plane of La2CuO4, and ε{lunate} = 32 in the a-b plane of EuBa2Cu3O6. The implications of these large dielectric constants for high temperature superconductivity are discussed. © 1990.
引用
收藏
页码:264 / 266
页数:3
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