1998/03/31 by Jonghwa Eom, Chen-Jung Chien, C. J. Chien +1 · 3 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.81.437
4 pages, 4 figures
arxiv created 1998/05/25 · openalex publication_date 1998/07/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 \ensuremathΦ0\phantom\rule0ex0ex=\phantom\rule0ex0exh/2e. The magnitude of S increases as the temperature T is lowered, reaching a maximum at T\ensuremath∼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.