Topological Effects on Quantum Phase Slips in Superfluid Spin Transport

Abstract

We theoretically investigate effects of quantum fluctuations on superfluid spin transport through easy-plane quantum antiferromagnetic spin chains in the large-spin limit. Quantum fluctuations give rise to decaying of spin supercurrent by unwinding the magnetic order parameter within the easy plane, which is referred to as phase slips. We show that the topological term in the nonlinear sigma model for the spin chains qualitatively differentiates decaying rate of the spin supercurrent between integer spin and half-odd-integer spin chains. An experimental setup for a magnetoelectric circuit is proposed, in which the dependence of the decaying rate on constituent spins can be verified by measuring nonlocal magnetoresistance.

5 pages, 3 figures

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• Spin Superfluidity in Biaxial Antiferromagnetic Insulators
• Propagation length of antiferromagnetic magnons governed by domain configurations
• Magnetic Domain Walls as Hosts of Spin Superfluids and Generators of Skyrmions
• Energy Storage via Topological Spin Textures
• Exploiting Coherence in Nonlinear Spin-Superfluid Transport
• Quantum hydrodynamics of spin winding
• Winding up quantum spin helices: How avoided level crossings exile classical topological protection
• Hydrodynamic description of long-distance spin transport through noncollinear magnetization states: the role of dispersion, nonlinearity, and damping
• Perspectives on spin hydrodynamics in ferromagnetic materials
• Energy storage in magnetic textures driven by vorticity flow
• Magnetic Domain Wall Floating on a Spin Superfluid
• Quantum spin helices more stable than the ground state: onset of helical protection
• Interaction Between a Domain Wall and Spin Supercurrent in Easy-cone Magnets
• Controllable vortex shedding from dissipative exchange flows in ferromagnetic channels
• The quantum skyrmion Hall effect in f electron systems
• All product eigenstates in Heisenberg models from a graphical construction
• Dissipationless Spin-Charge Conversion in Excitonic Pseudospin Superfluid
• Contact solitons as spin pistons in one-dimensional ferromagnetic channels
• Dynamics of metastable contact soliton dissipative exchange flows in one-dimensional ferromagnetic channels
• Generalized Josephson effect with arbitrary periodicity in quantum magnets