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Kagome Lattice Promotes Chiral Spin Fluctuations

Abstract

Dynamical spin fluctuations in magnets can be endowed with a slight bent toward left- or right-handed chirality by Dzyaloshinskii-Moriya interactions. However, little is known about the crucial role of lattice geometry on these chiral spin fluctuations and on fluctuation-related transport anomalies driven by the quantum-mechanical (Berry) phase of conduction electrons. Via thermoelectric Nernst effect and electric Hall effect experiments, we detect chiral spin fluctuations in the paramagnetic regime of a kagome lattice magnet; these signals are largely absent in a comparable triangular lattice magnet. Supported by Monte Carlo calculations, we identify lattices with at least two dissimilar plaquettes as most promising for Berry phase phenomena driven by thermal fluctuations in paramagnets.

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DOI:
Digital Object Identifier (open in new tab) 10.1103/PhysRevLett.130.136701
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Copyright (2023 American Physical Society)

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
PHYSICAL REVIEW LETTERS no. 130,
ISSN: 0031-9007
Language:
English
Publication year:
2023
Bibliographic description:
Kolincio K., Hirschberger M., Masell J., Arima T., Nagaosa N., Tokura Y.: Kagome Lattice Promotes Chiral Spin Fluctuations// PHYSICAL REVIEW LETTERS -Vol. 130,iss. 13 (2023),
DOI:
Digital Object Identifier (open in new tab) 10.1103/physrevlett.130.136701
Sources of funding:
  • Opłatę w wysokości 830 USD pokrył Instytut RIKEN
Verified by:
Gdańsk University of Technology

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