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  Thermal Hall effect of magnons in collinear antiferromagnetic insulators: signatures of magnetic and topological phase transitions

Neumann, R. R., Mook, A., Henk, J., & Mertig, I. (2022). Thermal Hall effect of magnons in collinear antiferromagnetic insulators: signatures of magnetic and topological phase transitions. Physical Review Letters, 128(11): 117201. doi:10.1103/PhysRevLett.128.117201.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000A-DC43-3 Version Permalink: https://hdl.handle.net/21.11116/0000-000D-8D68-0
Genre: Journal Article

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 Creators:
Neumann, Robin R.1, 2, Author
Mook, Alexander1, Author
Henk, Jürgen1, Author
Mertig, Ingrid1, Author
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1External Organizations, ou_persistent22              
2International Max Planck Research School for Science and Technology of Nano-Systems, Max Planck Institute of Microstructure Physics, Max Planck Society, Weinberg 2, 06120 Halle (Saale), Germany, ou_3399928              

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 Abstract: We demonstrate theoretically that the thermal Hall effect of magnons in collinear antiferromagnetic insulators is an indicator of magnetic and topological phase transitions in the magnon spectrum. The transversal heat current of magnons caused by a thermal gradient is calculated for an antiferromagnet on a honeycomb lattice. An applied magnetic field drives the system from the antiferromagnetic phase via a spin-flop phase into the field-polarized phase. In addition to these magnetic phase transitions, we find topological phase transitions within the spin-flop phase. Both types of transitions manifest themselves in prominent and distinguishing features in the thermal conductivity, which changes by several orders of magnitude. The variation of temperature provides a tool to discern experimentally the two types of phase transitions. We include numerical results for the van der Waals magnet MnPS3.

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 Dates: 2022-03-142022-03-18
 Publication Status: Issued
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 Identifiers: DOI: 10.1103/PhysRevLett.128.117201
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 128 (11) Sequence Number: 117201 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1