A1 Journal article (refereed)
Giant enhancement to spin battery effect in superconductor/ferromagnetic insulator systems (2021)


Ojajärvi, R., Heikkilä, T. T., Virtanen, P., & Silaev, M. A. (2021). Giant enhancement to spin battery effect in superconductor/ferromagnetic insulator systems. Physical Review B, 103(22), Article 224524. https://doi.org/10.1103/PhysRevB.103.224524


JYU authors or editors


Publication details

All authors or editorsOjajärvi, Risto; Heikkilä, Tero T.; Virtanen, P.; Silaev, M. A.

Journal or seriesPhysical Review B

ISSN2469-9950

eISSN2469-9969

Publication year2021

Publication date22/06/2021

Volume103

Issue number22

Article number224524

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/PhysRevB.103.224524

Publication open accessNot open

Publication channel open access

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/76942


Abstract

We develop a theory of the spin battery effect in superconductor/ferromagnetic insulator (SC/FI) systems taking into account the magnetic proximity effect. We demonstrate that the spin-energy mixing enabled by the superconductivity leads to the enhancement of spin accumulation by several orders of magnitude relative to the normal state. This finding can explain the recently observed giant inverse spin Hall effect generated by thermal magnons in the SC/FI system. We suggest a nonlocal electrical detection scheme which can directly probe the spin accumulation driven by the magnetization dynamics. We predict a giant Seebeck effect converting the magnon temperature bias into the nonlocal voltage signal. We also show how this can be used to enhance the sensitivity of magnon detection even up to the single-magnon level.


Keywordssuperconductorsinsulators (electrical devices)magnetic propertiesspin (quantum mechanics)


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Ministry reportingYes

Reporting Year2021

JUFO rating2


Last updated on 2024-22-04 at 17:35