Odd-frequency superconductivity revealed by thermopower

Sun-Yong Hwang, Pablo Burset Atienza, Björn Sothmann

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)
165 Downloads (Pure)

Abstract

Superconductivity is characterized by a nonvanishing superconducting pair amplitude. It has a definite symmetry in spin, momentum, and frequency (time). While the spin and momentum symmetry have been probed experimentally for different classes of superconductivity, the odd-frequency nature of certain superconducting correlations has not been demonstrated yet in a direct way. Here, we propose the thermopower as an unambiguous way to assess odd-frequency superconductivity. This is possible since the thermoelectric coefficient given by Andreev-like processes is only finite in the presence of odd-frequency superconductivity. We illustrate our general findings with a simple example of a superconductor-quantum-dot-ferromagnet hybrid.
Original languageEnglish
Article number161408
Pages (from-to)1-5
JournalPhysical Review B
Volume98
Issue number16
DOIs
Publication statusPublished - 24 Oct 2018
MoE publication typeA1 Journal article-refereed

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