Two-Fluid Theory for Spin Superfluidity in Magnetic Insulators
Mesoscale and Nanoscale Physics
2016-03-23 v2
Abstract
We investigate coupled spin and heat transport in easy-plane magnetic insulators. These materials display a continuous phase transition between normal and condensate states that is controlled by an external magnetic field. Using hydrodynamic equations supplemented by Gross-Pitaevski phenomenology and magnetoelectric circuit theory, we derive a two-fluid model to describe the dynamics of thermal and condensed magnons, and the appropriate boundary conditions in a hybrid normal-metal|magnetic-insulator|normal-metal heterostructure. We discuss how the emergent spin superfluidity can be experimentally probed via a spin Seebeck effect measurement.
Keywords
Cite
@article{arxiv.1510.05316,
title = {Two-Fluid Theory for Spin Superfluidity in Magnetic Insulators},
author = {B. Flebus and S. A. Bender and Y. Tserkovnyak and R. A. Duine},
journal= {arXiv preprint arXiv:1510.05316},
year = {2016}
}