Role of Magnon-Magnon Scattering in Magnon Polaron Spin Seebeck Effect

Shi, Zhong; Xi, Qing; Li, Junxue; Li, Yufei; Aldosary, Mohammed; Xu, Yadong; Zhou, Jun; Zhou, Shi-Ming; Shi, Jing

doi:10.1103/physrevlett.127.277203

Role of Magnon-Magnon Scattering in Magnon Polaron Spin Seebeck Effect

Journal Article · Tue Dec 28 00:00:00 EST 2021 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.127.277203· OSTI ID:1980245

^[1]; Xi, Qing ^[2]; Li, Junxue ^[3]; Li, Yufei ^[2]; Aldosary, Mohammed ^[3]; ^[3]; Zhou, Jun ^[4]; Zhou, Shi-Ming ^[2]; ^[3]

Tongji Univ., Shanghai (China); Univ. of California, Riverside, CA (United States); OSTI
Tongji Univ., Shanghai (China)
Univ. of California, Riverside, CA (United States)
Nanjing Normal Univ. (China)

The spin Seebeck effect (SSE) signal of magnon polarons in bulk-Y₃Fe₅O₁₂ (YIG)/Pt heterostructures is found to drastically change as a function of temperature. It appears as a dip in the total SSE signal at low temperatures, but as the temperature increases, the dip gradually decreases before turning to a peak. We attribute the observed dip-to-peak transition to the rapid rise of the four-magnon scattering rate. Our analysis provides important insights into the microscopic origin of the hybridized excitations and the overall temperature dependence of the SSE anomalies.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, Riverside, CA (United States)

Sponsoring Organization:: National Key R&D Program of China; National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-07ER46351; SC0012670

OSTI ID:: 1980245

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 27 Vol. 127; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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