Investigation of the magnetoelastic coupling anisotropy in the Kitaev material α-RuCl3

  • The Kitaev material α-RuCl3 is among the most prominent candidates to host a quantum spin-liquid state endowed with fractionalized excitations. Recent experimental and theoretical investigations have separately revealed the importance of both the magnetoelastic coupling and the magnetic anisotropy, in dependence of the applied magnetic field direction. In this combined theoretical and experimental research, we investigate the anisotropic magnetic and magnetoelastic properties for magnetic fields applied along the main crystallographic axes as well as for fields canted out of the honeycomb plane. We found that the magnetostriction anisotropy is unusually large compared to the anisotropy of the magnetization, which is related to the strong magnetoelastic Γ′˜-type coupling in our \textit{ab-initio} derived model. We observed large, non-symmetric magnetic anisotropy for magnetic fields canted out of the honeycomb ab-plane in opposite directions, namely towards the +c∗ or −c∗ axes, respectively. The observed directional anisotropy is explained by considering the relative orientation of the magnetic field with respect to the co-aligned RuCl6 octahedra. Magnetostriction measurements in canted fields support this non-symmetric magnetic anisotropy, however these experiments are affected by magnetic torque effects. Comparison of theoretical predictions with experimental findings allow us to recognize the significant contribution of torque effects in experimental setups where α-RuCl3 is placed in canted magnetic fields.

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Author:Vilmos KocsisORCiD, David Andreas Songzi KaibORCiDGND, Kira Marina RiedlORCiDGND, Sebastian Gass, Paula Lampen-Kelley, David G. MandrusORCiD, Stephen E. NaglerORCiD, Nicolás Pérez RodriguezGND, Kornelius NielschORCiDGND, Bernd BüchnerORCiDGND, Anja U. B. WolterORCiDGND, Roser ValentíORCiDGND
URN:urn:nbn:de:hebis:30:3-824549
URL:https://arxiv.org/abs/2202.07102v1
DOI:https://doi.org/10.48550/arXiv.2202.07102
ArXiv Id:http://arxiv.org/abs/2202.07102v1
Parent Title (English):arXiv
Publisher:arXiv
Document Type:Preprint
Language:English
Date of Publication (online):2022/02/15
Date of first Publication:2022/02/15
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2024/02/19
Issue:2202.07102 Version 1
Edition:Version 1
Page Number:15
HeBIS-PPN:516154850
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0