Magnon Condensation and Spin Superfluidity
Quantum Gases
2017-12-13 v2
Abstract
We consider the phenomenon of Bose-Einstein condensation of quasi-equilibrium magnons which leads to a spin superfluidity, the coherent quantum transfer of magnetization in magnetic materials. These phenomena are beyond the classical Landau-Lifshitz-Gilbert paradigm. The critical conditions for excited magnon density for ferro- and antiferromagnets, bulk and thin films are estimated and discussed. The BEC should occur in the antiferromagnetic hematite at much lower excited magnon density compared to the ferromagnetic YIG.
Cite
@article{arxiv.1702.00846,
title = {Magnon Condensation and Spin Superfluidity},
author = {Yury M. Bunkov and Vladimir L. Safonov},
journal= {arXiv preprint arXiv:1702.00846},
year = {2017}
}
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