Phase Dependent Thermopower in Andreev Interferometers
Mesoscale and Nanoscale Physics
2009-10-31 v3 Superconductivity
Abstract
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 (= h/2e). The magnitude of S increases as the temperature T is lowered, reaching a maximum around T = 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.
Cite
@article{arxiv.cond-mat/9803371,
title = {Phase Dependent Thermopower in Andreev Interferometers},
author = {Jonghwa Eom and Chen-Jung Chien and Venkat Chandrasekhar},
journal= {arXiv preprint arXiv:cond-mat/9803371},
year = {2009}
}
Comments
4 pages, 4 figures