A short note on spin pumping theory with Landau-Lifshitz-Gilbert equation under quantum fluctuation; necessity for quantization of localized spin
Mesoscale and Nanoscale Physics
2012-05-23 v1 Quantum Gases
Statistical Mechanics
Strongly Correlated Electrons
Abstract
We would like to point out the blind spots of the approach combining the spin pumping theory proposed by Tserkovnyak et al. with the Landau-Lifshitz-Gilbert equation; this method has been widely used for interpreting vast experimental results. The essence of the spin pumping effect is the quantum fluctuation. Thus, localized spin degrees of freedom should be quantized, i.e. be treated as magnons not as classical variables. Consequently, the precessing ferromagnet can be regarded as a magnon battery. This point of view will be useful for further progress of spintronics.
Cite
@article{arxiv.1204.2339,
title = {A short note on spin pumping theory with Landau-Lifshitz-Gilbert equation under quantum fluctuation; necessity for quantization of localized spin},
author = {Kouki Nakata},
journal= {arXiv preprint arXiv:1204.2339},
year = {2012}
}
Comments
10pages, 1 figure. This article is closely related to the work by K. N.; arXiv:1201.1947