Cryogenic spin seebeck effect

Mehrdad Elyasi; Gerrit E.W. Bauer

doi:10.1103/PhysRevB.103.054436

Cryogenic spin seebeck effect

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Abstract

We present a theory of the nonlinear spin Seebeck effect (SSE) in a ferromagnetic nanowire at cryogenic temperatures. We adopt a microscopic quantum noise model based on a collection of two-level systems. At certain positions of Pt detectors to the wire, the transverse SSE changes sign as a function of temperature and/or temperature gradient. On the other hand, the longitudinal SSE does not show significant nonlinearities even far outside the regime of validity of linear response theory.

Original language	English
Article number	054436
Journal	Physical Review B
Volume	103
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.103.054436
Publication status	Published - 2021 Feb 24

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Cryogenic spin seebeck effect",

abstract = "We present a theory of the nonlinear spin Seebeck effect (SSE) in a ferromagnetic nanowire at cryogenic temperatures. We adopt a microscopic quantum noise model based on a collection of two-level systems. At certain positions of Pt detectors to the wire, the transverse SSE changes sign as a function of temperature and/or temperature gradient. On the other hand, the longitudinal SSE does not show significant nonlinearities even far outside the regime of validity of linear response theory.",

author = "Mehrdad Elyasi and Bauer, {Gerrit E.W.}",

note = "Funding Information: We acknowledge support from JSPS KAKENHI Grants No. 20H02609 and No. 19H006450. Publisher Copyright: {\textcopyright} 2021 American Physical Society",

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Cryogenic spin seebeck effect

Abstract

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