Magnonic black holes
arXiv:1610.02313 · doi:10.1103/PhysRevLett.118.061301
Abstract
We show that the interaction between spin-polarized current and magnetization dynamics can be used to implement black-hole and white-hole horizons for magnons - the quanta of oscillations in the magnetization direction in magnets. We consider three different systems: easy-plane ferromagnetic metals, isotropic antiferromagnetic metals, and easy-plane magnetic insulators. Based on available experimental data, we estimate that the Hawking temperature can be as large as 1 K. We comment on the implications of magnonic horizons for spin-wave scattering and transport experiments, and for magnon entanglement.
6 pages, 1 figure
References in corpus (13)
- Spin Transfer Torques
- Fiber-optical analogue of the event horizon
- Measurement of stimulated Hawking emission in an analogue system
- Microscopic approach to current-driven domain wall dynamics
- Observation of self-amplifying Hawking radiation in an analog black hole laser
- Hawking radiation from ultrashort laser pulse filaments
- Observation of negative-frequency waves in a water tank: A classical analogue to the Hawking effect?
- Phenomenology of Current-Induced Dynamics in Antiferromagnets
- Superfluid spin transport through antiferromagnetic insulators
- Microscopic Calculation of Spin Torques in Disordered Ferromagnets
- Black hole and Hawking radiation by type-II Weyl fermions
- Functional Keldysh Theory of Spin Torques
- Quantum entanglement in analogue Hawking radiation, when is the final state non-separable ?