Abstract
The phenomenon of superfluidity (superconductivity) is a possibility of transport of mass (charge) on macroscopical distances without essential dissipation. In magnetically ordered media with easy-plane topology of the order parameter space the superfluid transport of spin is also possible despite the absence of the strict conservation law for spin. The article addresses three key issues in the theory of spin superfluidity: topology of the order parameter space, Landau criterion for superfluidity, and decay of superfluid currents via phase slip events, in which magnetic vortices cross current streamlines. Experiments on detection of spin superfluidity are also surveyed.
Original language | English |
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Title of host publication | Encyclopedia of Condensed Matter Physics |
Publisher | Elsevier |
Pages | V3:51-V3:67 |
ISBN (Electronic) | 9780323908009 |
ISBN (Print) | 9780323914086 |
DOIs | |
State | Published - 1 Jan 2024 |
Bibliographical note
Publisher Copyright:© 2024 Elsevier Ltd. All rights reserved.
Keywords
- Coherent spin precession
- Landau criterion
- Magnetic vortex
- Oder parameter
- Phase slip
- Skyrmion
- Spin supercurrent
- Spin superfluidity
- Spin wave
- Topology