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Title: Spin Nernst effect of magnons in collinear antiferromagnets

Journal Article · · Physical Review Letters
 [1];  [2];  [1]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In a collinear antiferromagnet with easy-axis anisotropy, symmetry guarantees that the spin wave modes are doubly degenerate. The two modes carry opposite spin angular momentum and exhibit opposite chirality. Using a honeycomb antiferromagnet in the presence of the Dzyaloshinskii-Moriya interaction, we show that a longitudinal temperature gradient can drive the two modes to opposite transverse directions, realizing a spin Nernst effect of magnons with vanishing thermal Hall current. We find that magnons around the $$\Gamma$$ point and the $$K$$ point contribute oppositely to the transverse spin transport, and their competition leads to a sign change of the spin Nernst coefficient at finite temperature. As a result, possible material candidates are discussed.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; SC0012509
OSTI ID:
1333660
Alternate ID(s):
OSTI ID: 1332147
Journal Information:
Physical Review Letters, Vol. 117, Issue 21; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 157 works
Citation information provided by
Web of Science

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Cited By (31)

Spin Dynamics and Dirac Nodes in a Kagome Lattice journal December 2019
Thermal Engineering in Low-Dimensional Quantum Devices: A Tutorial Review of Nonequilibrium Green's Function Methods journal April 2018
Asymmetric dynamics of edge exchange spin waves in honeycomb nanoribbons with zigzag and bearded edge boundaries journal April 2019
Magnonic Floquet Quantum Spin Hall Insulator in Bilayer Collinear Antiferromagnets journal May 2019
A new class of nonreciprocal spin waves on the edges of 2D antiferromagnetic honeycomb nanoribbons journal October 2019
Designing Rashba–Dresselhaus effect in magnetic insulators journal March 2019
Probing and controlling magnetic states in 2D layered magnetic materials journal September 2019
Magnetic behaviour of bimetallic layered phases M′ 0.2 Mn 0.8 PS 3 ·0.25 H 2 O (M′ = Zn II , Cu II , Ni II , Co II ) journal January 2017
Spin currents and magnon dynamics in insulating magnets journal February 2017
Topological magnon bands and unconventional thermal Hall effect on the frustrated honeycomb and bilayer triangular lattice journal August 2017
On the origin of magnetic anisotropy in two dimensional CrI 3 journal June 2017
Ultrafast control of spin interactions in honeycomb antiferromagnetic insulators journal August 2019
Magnonic analog of the Edelstein effect in antiferromagnetic insulators journal January 2020
Controlling chiral domain walls in antiferromagnets using spin-wave helicity journal January 2018
Nonabelian magnonics in antiferromagnets journal October 2018
Z 2 topological invariant for magnon spin Hall systems journal January 2019
Topological spin Hall effects and tunable skyrmion Hall effects in uniaxial antiferromagnetic insulators journal June 2019
Magnon Spin-Momentum Locking: Various Spin Vortices and Dirac magnons in Noncollinear Antiferromagnets journal September 2017
Magnonic topological insulators in antiferromagnets text January 2017
Magnon spin Nernst effect in antiferromagnets text January 2016
On the origin of magnetic anisotropy in two dimensional CrI$_3$ text January 2017
Topological Magnon Bands and Unconventional Thermal Hall Effect on the Frustrated Honeycomb and Bilayer Triangular Lattice text January 2017
Thermal engineering in low-dimensional quantum devices: a tutorial review of nonequilibrium Green's function methods text January 2018
Topological Magnons and Edge States in Antiferromagnetic Skyrmion Crystals text January 2018
Asymmetric dynamics of edge exchange spin waves in honeycomb nanoribbons with zigzag and bearded edges boundaries text January 2019
Magnon transport in quasi-two-dimensional van der Waals antiferromagnets text January 2019
Topological spin Hall effects and tunable skyrmion Hall effects in uniaxial antiferromagnetic insulators text January 2019
A new class of nonreciprocal spin waves on the edges of 2D antiferromagnetic honeycomb nanoribbons text January 2019
Thermal Hall Effect Induced by Magnon-Phonon Interactions text January 2019
Ultrafast Control of Spin Interactions in Honeycomb Antiferromagnetic Insulators text January 2019
Magnonic Analogue of Edelstein Effect in Antiferromagnetic Insulators text January 2019

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