Linear-response theory of the longitudinal spin Seebeck effect

Hiroto Adachi, Sadamichi Maekawa

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We theoretically investigate the longitudinal spin Seebeck effect, in which the spin current is injected from a ferromagnet into an attached nonmagnetic metal in a direction parallel to the temperature gradient. Using the fact that the phonon heat current flows intensely into the attached nonmagnetic metal in this particular configuration, we show that the sign of the spin injection signal in the longitudinal spin Seebeck effect can be opposite to that in the conventional transverse spin Seebeck effect when the electron-phonon interaction in the nonmagnetic metal is sufficiently large. Our linear-response approach can explain the sign reversal of the spin injection signal recently observed in the longitudinal spin Seebeck effect.

Original languageEnglish
Pages (from-to)1753-1758
Number of pages6
JournalJournal of the Korean Physical Society
Volume62
Issue number12
DOIs
Publication statusPublished - Jul 1 2013
Externally publishedYes

Keywords

  • Spin Seebeck effect
  • Spin caloritronics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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