Two-Fluid Theory for Spin Superfluidity in Magnetic Insulators

B. Flebus; S. A. Bender; Y. Tserkovnyak; R. A. Duine

doi:10.1103/PhysRevLett.116.117201

Two-Fluid Theory for Spin Superfluidity in Magnetic Insulators

B. Flebus, S. A. Bender, Y. Tserkovnyak, R. A. Duine

Research output: Contribution to journal › Article › Academic › peer-review

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.

Original language	English
Article number	117201
Pages (from-to)	1-5
Journal	Physical Review Letters
Volume	116
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.116.117201
Publication status	Published - 18 Mar 2016

Keywords

cond-mat.mes-hall

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10.1103/PhysRevLett.116.117201

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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.",

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AU - Duine, R. A.

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Y1 - 2016/3/18

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AB - 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.

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DO - 10.1103/PhysRevLett.116.117201

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Two-Fluid Theory for Spin Superfluidity in Magnetic Insulators

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