Giant nernst effect due to fluctuating cooper Pairs in superconductors

M. N. Serbyn, M. A. Skvortsov, A. A. Varlamov, V. Galitski

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

A theory of the fluctuation-induced Nernst efl'ect is developed for a two-dimensional superconductor in a perpendicular magnetic field. First, we derive a simple phenomenological formula for the Nernst coefficient, which naturally explains the giant Nernst signal due to fluctuating Cooper pairs. The latter signal is shown to be large even far from the transition and may exceed by orders of magnitude the Fermi liquid terms. We also present a complete microscopic calculation of the Nernst coefficient for arbitrary magnetic fields and temperatures, which is based on the standard definition of heat current vertices. It is shown that the magnitude and the behavior of the Nernst signal observed experimentally in disordered superconducting films can be well understood on the basis of superconducting fluctuation theory.

Original languageEnglish
Title of host publicationAdvances in Theoretical Physics - Landau Memorial Conference
Pages140-145
Number of pages6
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventLandau Memorial Conference on Advances in Theoretical Physics - Chernogolovka, Russian Federation
Duration: 22 Jun 200822 Jun 2008

Publication series

NameAIP Conference Proceedings
Volume1134
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceLandau Memorial Conference on Advances in Theoretical Physics
Country/TerritoryRussian Federation
CityChernogolovka
Period22/06/0822/06/08

Keywords

  • Nerst effect
  • Supercondictors

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