THE ENERGY-GAP OF THE HIGH-TC SUPERCONDUCTOR LA1.85SR0.15CUO4

被引：24
|
作者：
BONN, DA
GREEDAN, JE
STAGER, CV
TIMUSK, T
机构：
[1] McMaster Univ, Hamilton, Ont, Can, McMaster Univ, Hamilton, Ont, Can
来源：
SOLID STATE COMMUNICATIONS | 1987年 / 62卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
BAND STRUCTURE - CERAMIC MATERIALS - Optical Properties - INFRARED RADIATION - Reflection - LANTHANUM COMPOUNDS - Optical Properties;
D O I：
10.1016/0038-1098(87)91038-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have measured the energy gap of a polycrystalline sample of La//1//. //8//5Sr//0//. //1//5CuO//4 using far-infrared reflectance. The sample was prepared by sintering and has a superconducting transition at 36 plus or minus 1 K (mid point of a 2K wide region) both in resistance and magnetic susceptibility. The Meissner effect was incomplete and there was considerable absorption below the gap frequency in the superconducting state. The change in far infrared absorption on going to the superconducting state was fitted to the theory of D. C. Mattis and J. Bardeen, yielding an energy gap of (3. 2 plus or minus 0. 3)kT//c with T//c equals 36 K.
引用
收藏
页码：383 / 385
页数：3
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