Nonreciprocal spin Seebeck effect in antiferromagnets

Abstract

We theoretically propose a nonreciprocal spin Seebeck effect, i.e., nonreciprocal spin transport generated by a temperature gradient, in antiferromagnetic insulators with broken inversion symmetry. We find that nonreciprocity in antiferromagnets has rich properties not expected in ferromagnets. In particular, we show that polar antiferromagnets, in which the crystal lacks the spatial inversion symmetry, exhibit perfect nonreciprocity --- one-way spin current flow irrespective of the direction of the temperature gradient. We also show that nonpolar centrosymmetric crystals can exhibit nonreciprocity when a magnetic order breaks the inversion symmetry, and in this case, the direction of the nonreciprocal flow can be controlled by reversing the magnetic domain. As their representatives, we calculate the nonreciprocal spin Seebeck voltages for the polar antiferromagnet $\alpha$-Cu${}_2$V${}_2$O${}_7$ and the honeycomb antiferromagnet MnPS${}_3$, while varying temperature and magnetic field.

arXiv comment5 pages, 3 figures

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Cited by in corpus (20)

• Classification of atomic-scale multipoles under crystallographic point groups and application to linear response tensors
• Phonon and Thermal Properties of Quasi-Two-Dimensional FePS3 and MnPS3 Antiferromagnetic Semiconductor Materials
• Nonlinear magnon spin Nernst effect in antiferromagnets and strain-tunable pure spin current
• Nonreciprocal Magnon by Symmetric Anisotropic Exchange Interaction in Honeycomb Antiferromagnet
• Odd-Parity Multipoles by Staggered Magnetic Dipole and Electric Quadrupole Orderings in CeCoSi
• Essential model parameters for nonreciprocal magnons in multisublattice systems
• Rectification of the spin Seebeck current in noncollinear antiferromagnets
• Spin Seebeck Effect in Nonmagnetic Excitonic Insulators
• Nonreciprocal dynamics of ferrimagnetic bimerons
• Exciton-magnon splitting in van der Waals antiferromagnet MnPS${}_3$ unveiled by second-harmonic generation
• Acousto-magnonic spin Hall effect in honeycomb antiferromagnets
• Non-linear magnon transport in a bilayer van der Waals antiferromagnets
• Asymmetric modulation of Majorana excitation spectra and nonreciprocal thermal transport in the Kitaev spin liquid under a staggered magnetic field
• Nonlinear charge and thermal transport properties induced by orbital magnetic moment in chiral crystal cobalt monosilicide
• Interband contributions to nonlinear transport in semiconductor nanostructures
• Interaction-induced nonlinear magnon transport in noncentrosymmetric magnets
• Quantum information diode based on a magnonic crystal
• Uniform and Staggered electric axial moment in zigzag chain
• Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet
• Nonreciprocal magnon excitations by the Dzyaloshinskii-Moriya interaction on the basis of bond magnetic toroidal multipoles