Bose-Einstein Condensation of Nonequilibrium Magnons in Confined Systems
arXiv:2002.09777 · doi:10.1088/1367-2630/aba98c
Abstract
We study the formation of a room temperature magnon Bose-Einstein condensate (BEC) in nanoscopic systems and demonstrate that its lifetime is influenced by the spatial confinement. We predict how dipolar interactions and nonlinear magnon scattering assist in the generation of a metastable magnon BEC in energy-quantized nanoscopic devices. We verify our prediction by a full numerical simulation of the Landau-Lifshitz-Gilbert equation and demonstrate the generation of magnon BEC in confined insulating magnets of yttrium iron garnet. We directly map out the nonlinear magnon scattering processes behind this phase transition to show how fast quantized thermalization channels allow the BEC formation in confined structures. Based on our results, we discuss a new mechanism to manipulate the BEC lifetime in nanoscaled systems. Our study greatly extends the freedom to study the dynamics of magnon BEC in realistic systems and to design integrated circuits for BEC-based applications at room temperature.
arXiv comment9 pages, 5 figures
References in corpus (23)
- The design and verification of Mumax3
- Bose-Einstein condensation of photons in an optical microcavity
- Bose-Einstein Condensation in Magnetic Insulators
- Magnon spin transport driven by the magnon chemical potential in a magnetic insulator
- Supercurrent in a room temperature Bose-Einstein magnon condensate
- Spin caloritronic nano-oscillator
- Spin pinning and spin-wave dispersion in nanoscopic ferromagnetic waveguides
- Theory of coherence in Bose-Einstein condensation phenomena in a microwave driven interacting magnon gas
- Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale
- Stability of Bose Einstein condensates of hot magnons in YIG
- Spin Superfluidity in Biaxial Antiferromagnetic Insulators
- Two-Fluid Theory for Spin Superfluidity in Magnetic Insulators
- Brillouin light scattering spectroscopy of parametrically excited dipole-exchange magnons
- Long-distance supercurrent transport in a room-temperature Bose-Einstein magnon condensate
- Backscattering immunity of dipole-exchange magnetostatic surface spin waves
- Rayleigh-Jeans condensation of pumped magnons in thin film ferromagnets
- Phase Diagram for Magnon Condensate in Yttrium Iron Garnet Film
- Stimulated Thermalization of a Parametrically Driven Magnon Gas as a Prerequisite for Bose-Einstein Magnon Condensation
- Nonlocal Spin Transport as a Probe of Viscous Magnon Fluids
- Difference in Bose-Einstein condensation of conserved and unconserved particles
- Spin currents, spin torques, and the concept of spin superfluidity
- Parametric pumping and kinetics of magnons in dipolar ferromagnets
- Parametric generation of propagating spin-waves in ultra thin yttrium iron garnet waveguides
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- Anisotropy-assisted magnon condensation in ferromagnetic thin films
- Entanglement properties of photon-magnon crystal from nonlinear perspective
- Thermal squeezing and nonlinear spectral shift of magnons in antiferromagnetic insulators
- Stability of chiral magnon condensates in collinear antiferromagnetic insulators
- Bose-Einstein condensate of Dirac magnons: Pumping and collective modes
- Nonequilibrium phase transition in a driven-dissipative quantum antiferromagnet