Phase dependent thermopower in Andreev interferometers

被引：93

作者：

Eom, J ^{[1
]}

Chien, CJ ^{[1
]}

Chandrasekhar, V ^{[1
]}

机构：

[1] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.81.437

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report measurements of the thermopower S of mesoscopic Andreev interferometers, which are hybrid loops with one arm fabricated from a superconductor (Al), and one arm from a normal metal (Au). S depends on the phase of electrons in the interferometer, oscillating as a function of magnetic flux with a period of one flux quantum Phi(o) = h/2e. The magnitude of S increases as the temperature T is lowered, reaching a maximum at T similar to 0.14 K, and decreases at lower temperatures. The symmetry of S oscillations with respect to magnetic flux depends on the topology of the sample.

引用

页码：437 / 440

页数：4

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