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Condensed Matter > Mesoscale and Nanoscale Physics
Title: Spin Nernst Effect of Antiferromagnetic Magnons in the Presence of Spin Diffusion
(Submitted on 11 Mar 2021 (v1), last revised 21 Sep 2021 (this version, v3))
Abstract: Magnon spin Nernst effect was recently proposed as an intrinsic effect in antiferromagnets, where spin diffusion and boundary spin transmission have been ignored. However, diffusion processes are essential to convert a bulk spin current into boundary spin accumulation, which determines the spin injection rate into detectors through imperfect transmission. We formulate a diffusive theory to describe the detection of magnon spin Nernst effect with boundary conditions reflecting real device geometry. Thanks to the spin diffusion effect, the output signals in both electronic and optical detection grow rapidly with an increasing system size in the transverse dimension, which eventually saturate. Counterintuitively, the measurable signals are even functions of magnetic field, yielding optical detection more favorable than electronic detection.
Submission history
From: Hantao Zhang [view email][v1] Thu, 11 Mar 2021 18:56:21 GMT (1282kb,D)
[v2] Tue, 25 May 2021 02:49:11 GMT (1167kb,D)
[v3] Tue, 21 Sep 2021 23:31:46 GMT (1161kb,D)
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