Two-Fluid Theory for Spin Superfluidity in Magnetic Insulators

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.

References in corpus (5)

• Bose-Einstein Condensation in Magnetic Insulators
• Superfluid spin transport through antiferromagnetic insulators
• Interfacial Spin and Heat Transfer between Metals and Magnetic Insulators
• Dynamic phase diagram of dc-pumped magnon condensates
• Thermally-driven spin torques in layered magnetic insulators

Cited by in corpus (66)

• Antiferromagnetic spintronics
• Magnon spin transport driven by the magnon chemical potential in a magnetic insulator
• Control and Local Measurement of the Spin Chemical Potential in a Magnetic Insulator
• Magnon-drag thermopower and Nernst coefficient in Fe, Co, and Ni
• Magnonic frequency comb through nonlinear magnon-skyrmion scattering
• Magnonic quantum Hall effect and Wiedemann-Franz law
• Spin transport in a magnetic insulator with zero effective damping
• Quantum-impurity relaxometry of magnetization dynamics
• Evidence for the role of the magnon energy relaxation length in the Spin Seebeck Effect
• Magnon-squeezing as a niche of quantum magnonics
• Magnon Valves Based on YIG/NiO/YIG All-Insulating Magnon Junctions
• Magnonic black holes
• Tuning entanglement by squeezing magnons in anisotropic magnets
• Magnons and Phonons Optically Driven Out of Local Equilibrium in a Magnetic Insulator
• Breaking of Galilean invariance in the hydrodynamic formulation of ferromagnetic thin films
• Temperature dependent relaxation of dipole-exchange magnons in yttrium iron garnet films
• Observation of nuclear-spin Seebeck effect
• Green's function formalism for spin transport in metal-insulator-metal heterostructures
• Antiferromagnetic magnon pseudospin: Dynamics and diffusive transport
• Thermally Driven Long Range Magnon Spin Currents in Yttrium Iron Garnet due to Intrinsic Spin Seebeck Effect
• Dynamic imaging of an antiferromagnetic domain wall via quantum-impurity relaxometry
• Long lifetime of thermally-excited magnons in bulk yttrium iron garnet
• Superfluid spin transport in ferro- and antiferromagnets
• Bose-Einstein Condensation of Magnons Pumped by the Bulk Spin Seebeck Effect
• Electrically Driven Bose-Einstein Condensation of Magnons in Antiferromagnets
• Spin currents, spin torques, and the concept of spin superfluidity
• Spin current cross-correlations as a probe of magnon coherence
• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Chemical potential of an antiferromagnetic magnon gas
• Thermal spin current and spin accumulation at ferromagnetic insulator/nonmagnetic metal interface
• Local thermomagnonic torques in two-fluid spin dynamics
• Spin-Wave Doppler Shift by Magnon Drag in Magnetic Insulators
• Thermodynamic Entanglement of Magnonic Condensates
• Bose-Einstein Condensation of Nonequilibrium Magnons in Confined Systems
• Transport signature of the magnetic Berezinskii-Kosterlitz-Thouless transition
• Hydrodynamic sound modes and Galilean symmetry breaking in a magnon fluid
• Self-stabilizing exchange-mediated spin transport
• Magnon-induced non-Markovian friction of a domain wall in a ferromagnet
• Magnons versus electrons in thermal spin transport through metallic interfaces
• Perspectives on spin hydrodynamics in ferromagnetic materials
• Spin wave driven domain wall motion in easy-plane ferromagnets: a particle perspective
• Spin superfluidity in noncollinear antiferromagnets
• Fundamentals and applications of Van der Waals magnets in magnon spintronics
• Spin-flip reflection at the normal metal-spin superconductor interface
• Universal field dependence of magnetic resonance near zero frequency
• Thickness dependence of spin Peltier effect visualized by thermal imaging technique
• Short-range Thermal Magnon Diffusion in Magnetic Garnet
• Spin Transport in Normal Metal-Ising Superconductor Junction
• Superfluidity and spin superfluidity in spinor Bose gases
• Transport properties of spin superfluids: comparing easy-plane ferro- and antiferromagnets
• Magnon spin transport around the compensation magnetic field in easy-plane antiferromagnetic insulators
• Ginzburg-Landau-type theory of non-polarized spin superconductivity
• Intertwining of lasing and superradiance under spintronic pumping
• Non-local magnon transconductance in extended magnetic insulating films.\\ Part I: spin diode effect
• Magnon Bose-Einstein condensate and supercurrents over a wide temperature range
• Magnon spin Hall magnetoresistance of a gapped quantum paramagnet
• Superfluid Spin Transistor
• Dynamics of metastable contact soliton dissipative exchange flows in one-dimensional ferromagnetic channels
• Mechanism for a Chemical Potential of Nonequilibrium Magnons in Parametric Parallel Pumping
• Nonreciprocal superfluidlike topological spin transport
• Spin Hall effect of vorticity
• Geometric phase driven Josephson junction: Possible experimental scheme for the search of spin superfluidity
• Superfluid-like spin transport in the dynamic states of easy-axis magnets
• Theory of drift-enabled control in nonlocal magnon transport
• Quantum Spin Superfluid from Bose-Einstein Condensation of Spinons in Pyrochlore Spin Ice
• Finite-frequency admittance and noise of a helical edge coupled to a magnet