NEW PHENOMENA IN PROXIMITY EFFECT TUNNELING OF HIGH-TC SUPERCONDUCTING CUPRATES

被引：8

作者：

HOLCOMB, M ^{[1
]}

COLLMAN, JP ^{[1
]}

LITTLE, WA ^{[1
]}

机构：

[1] STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305

来源：

PHYSICA C | 1991年 / 185卷

关键词：

D O I：

10.1016/0921-4534(91)90999-F

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A new type of geometric oscillation in the differential resistance of proximity effect junctions has been observed. The oscillations have been seen in Ag-High-T(c)-Tl(2223) cuprate sandwiches using a new tunneling technique - distributed point contact tunneling. The oscillations are similar to Tomasch-Rowell oscillations but exhibit no thermal broadening. They arise from multiple-reflection interference of the center-of-mass pair wave function across the Ag-film. The sandwiches exhibit a proximity effect at 80K which extends over a distance more than fifty times the Pippard coherence length. We explain the phenomenon using a BCS-type pairing model.

引用

页码：1747 / 1748

页数：2