PHASE MEMORY EFFECTS IN MESOSCOPIC RINGS WITH SUPERCONDUCTING MIRRORS

被引：137

作者：

PETRASHOV, VT ^{[1
]}

ANTONOV, VN ^{[1
]}

DELSING, P ^{[1
]}

CLAESON, R ^{[1
]}

机构：

[1] CHALMERS UNIV TECHNOL,DEPT PHYS,S-41296 GOTHENBURG,SWEDEN

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.70.347

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We find a drastic difference between the magnetoresistance of normal-metal (Ag) mesoscopic rings with superconducting boundaries (mirrors) and that of plain rings. The amplitude of h/2e Aharonov-Bohm oscillations is enhanced more than 100 times in rings with mirrors in the measuring leads. Rings with mirrors in stubs perpendicular to the current flow show h/4e and h/2e oscillations and evidence of a superconducting transition. The results are interpreted as due to a phase coupling between the superconductors via normal electrons, and to a confinement of quasiparticles to the ring by Andreev reflections.

引用

页码：347 / 350

页数：4

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