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arXiv · 2109.04329

Magnonic spin Joule heating and rectification effects

Morten Amundsen·Irina V. Bobkova·Akashdeep Kamra
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Abstract

Nonlinear devices, such as transistors, enable contemporary computing technologies. We theoretically investigate nonlinear effects, bearing a high fundamental scientific and technical relevance, in magnonics with emphasis on superconductor-ferromagnet hybrids. Accounting for finite magnon chemical potential, we theoretically demonstrate magnonic spin-Joule heating, the spin analogue of conventional electronic Joule heating. Besides suggesting a key contribution to magnonic heat transport in a broad range of devices, it provides insights into the thermal physics of non-conserved bosonic excitations. Considering a spin-split superconductor self-consistently, we demonstrate its interface with a ferromagnetic insulator to harbor large tunability of spin and thermal conductances. We further demonstrate hysteretic rectification I-V characteristics in this hybrid, where the hysteresis results from the superconducting state bistability.

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Morten Amundsen, Irina V. Bobkova, Akashdeep Kamra. 2021-09-09. Magnonic spin Joule heating and rectification effects. https://doi.org/10.1103/physrevb.106.144411

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