Sawtooth Torque in Anisotropic jeff=1/2 Magnets: Application to αRuCl3

Kira Riedl, Ying Li, Stephen M. Winter, and Roser Valentí
Phys. Rev. Lett. 122, 197202 – Published 15 May 2019
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Abstract

The so-called “Kitaev candidate” materials based on 4d5 and 5d5 metals have recently emerged as magnetic systems displaying strongly anisotropic exchange interactions reminiscent of the Kitaev’s honeycomb model. Recently, these materials have been shown to commonly display a distinct sawtooth angular dependence of the magnetic torque over a wide range of magnetic fields. While higher order chiral spin interactions have been considered as a source of this observation, we show here that bilinear anisotropic interactions and/or g anisotropy are each sufficient to explain the observed torque response, which may be distinguished on the basis of high-field measurements. These findings unify the understanding of magnetic torque experiments in a variety of Kitaev candidate materials.

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  • Received 28 September 2018
  • Revised 21 January 2019

DOI:https://doi.org/10.1103/PhysRevLett.122.197202

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Kira Riedl*, Ying Li, Stephen M. Winter, and Roser Valentí

  • Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 1, 60438 Frankfurt am Main, Germany

  • *riedl@itp.uni-frankfurt.de

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Issue

Vol. 122, Iss. 19 — 17 May 2019

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