Electrically Driven Bose-Einstein Condensation of Magnons in Antiferromagnets
arXiv:1612.00366 · doi:10.1103/PhysRevB.95.144408
Abstract
We explore routes to realize electrically driven Bose-Einstein condensation of magnons in insulating antiferromagnets. Even in insulating antiferromagnets, the localized spins can strongly couple to itinerant spins in adjacent metals via spin-transfer torque and spin pumping. We describe the formation of steady-state magnon condensates controlled by a spin accumulation polarized along the staggered field in an adjacent normal metal. Two types of magnons exist in antiferromagnets, which carry opposite magnetic moments. Consequently, and in contrast to ferromagnets, Bose-Einstein condensation can occur for either sign of the spin accumulation. This condensation may occur even at room temperature when the interaction with the normal metal is fast compared to the relaxation processes within the antiferromagnet. In antiferromagnets, the operating frequencies of the condensate are orders of magnitude faster than in ferromagnets.
13 pages, 1 figure
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Cited by in corpus (20)
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- Spin pumping and shot noise in ferrimagnets: bridging ferro- and antiferromagnets
- Enhancement of superconductivity mediated by antiferromagnetic squeezed magnons
- Chemical potential of quasi-equilibrium magnon gas driven by pure spin current
- Dephasing of Transverse Spin Current in Ferrimagnetic Alloys
- Superconductivity at metal-antiferromagnetic insulator interfaces
- Eliashberg study of superconductivity induced by interfacial coupling to antiferromagnets
- Spin Transport in Thick Insulating Antiferromagnetic Films
- Chemical potential of an antiferromagnetic magnon gas
- Spin-orbit torques in a Rashba honeycomb antiferromagnet
- Spin transport in an electrically-driven magnon gas near Bose-Einstein condensation: Hartree-Fock-Keldysh theory
- Spin transfer and spin pumping in disordered normal metal-antiferromagnetic insulator systems
- Crossover from Diffusive to Superfluid Transport in Frustrated Magnets
- Spin-pumping in superconductor-antiferromagnetic insulator bilayers
- Controlling stability of Bose-Einstein condensation of interacting magnons in an antiferromagnet by an external magnetic field
- Intertwining of lasing and superradiance under spintronic pumping
- Stability of chiral magnon condensates in collinear antiferromagnetic insulators
- Ferroelectricity in a magnon Bose-Einstein condensate: Nonreciprocal superfluidity, exceptional points, and Majorana bosons