Thermally-Activated Phase Slips in Superfluid Spin Transport in Magnetic Wires
Abstract
We theoretically study thermally-activated phase slips in superfluid spin transport in easy-plane magnetic wires within the stochastic Landau-Lifshitz-Gilbert phenomenology, which runs parallel to the Langer-Ambegaokar-McCumber-Halperin theory for thermal resistances in superconducting wires. To that end, we start by obtaining the exact solutions for free-energy minima and saddle points. We provide an analytical expression for the phase-slip rate in the zero spin-current limit, which involves detailed analysis of spin fluctuations at extrema of the free energy. An experimental setup of a magnetoeletric circuit is proposed, in which thermal phase slips can be inferred by measuring nonlocal magnetoresistance.
Keywords
Cite
@article{arxiv.1509.00904,
title = {Thermally-Activated Phase Slips in Superfluid Spin Transport in Magnetic Wires},
author = {Se Kwon Kim and So Takei and Yaroslav Tserkovnyak},
journal= {arXiv preprint arXiv:1509.00904},
year = {2016}
}
Comments
4 pages, 2 figures, and a supplemental material