TUNNEL SPECTROSCOPY INTO THE YBA2CU4O8 COMPOUND

被引:0
作者
ROMANO, P
DILEO, R
NIGRO, A
CUCOLO, AM
DABROWSKI, B
RADAELLI, PG
机构
[1] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439
[2] NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115
来源
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS | 1994年 / 16卷 / 10-11期
关键词
D O I
10.1007/BF02462189
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have realized planar tunnel junctions using both Y123 and Y124 single crystals as base electrodes and Pb as counterelectrode. The crystals, with T-c = = 90 K (Y123) and T-c = 80 K (Y124), have been chemically etched and natural barriers were formed by a short air exposure. We have compared the tunneling spectra obtained on both systems. The features at about +/-18 mV of the Y123 compound are still observed in the Y124, while the low-bias structures at +/- 5mV are not present in the tunneling characteristics of the Y124 system. Linearity of the background conductance is also observed, with less steep slopes in Y124 that might indicate a reduced interlayer coupling in this system.
引用
收藏
页码:1885 / 1888
页数:4
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