NO FAR-INFRARED-SPECTROSCOPIC GAP IN CLEAN AND DIRTY HIGH-TC SUPERCONDUCTORS

被引：32
|
作者：
MANDRUS, D
MARTIN, MC
KENDZIORA, C
KOLLER, D
FORRO, L
MIHALY, L
机构：
[1] ECOLE POLYTECH FED LAUSANNE, DEPT PHYS, CH-1015 LAUSANNE, SWITZERLAND
[2] UNIV ZAGREB, INST PHYS, 41001 ZAGREB, CROATIA
来源：
PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 17期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.70.2629
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report far-infrared transmission measurements on single crystal samples derived from Bi2Sr2CaCu2O8. The impurity scattering rate of the samples was varied by electron-beam irradiation, 50 MeV O-16(+6) ion irradiation, heat treatment in vacuum, and Y doping. Although substantial changes in the infrared spectra were produced, in no case was a feature observed that could be associated with the superconducting energy gap. These results all but rule out ''clean limit'' explanations for the absence of the spectroscopic gap in this material, and provide evidence that the superconductivity in Bi2Sr2CaCu2O8 is gapless.
引用
收藏
页码：2629 / 2632
页数：4
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