Phase dependent thermopower in andreev interferometers

Jonghwa Eom, Chen Jung Chien, Venkat Chandrasekhar

Research output: Contribution to journalArticlepeer-review

93 Scopus citations

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 Φ0=h/2e.The magnitude of S increases as the temperature T is lowered, reaching a maximum at T ∼0.14K, and decreases at lower temperatures. The symmetry of S oscillations with respect to magnetic flux depends on the topology of the sample.

Original languageEnglish (US)
Pages (from-to)437-440
Number of pages4
JournalPhysical review letters
Volume81
Issue number2
DOIs
StatePublished - Jul 13 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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