Dielectric Evidence for Possible Type-II Multiferroicity in alpha-RuCl3

\(\alpha\)-RuCl\(_3\) is a Mott insulator with a honeycomb lattice with strong spin-orbit coupling. We report dielectric measurements on \(\alpha\)-RuCl\(_3\) single crystals under field. At zero field, the dielectric constant, \(\epsilon\), drops rapidly when cooled through the magnetic transition...

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Bibliographic Details
Published in:arXiv.org 2018-02
Main Authors: Jia-Cheng, Zheng, Cui, Yi, Li, Tian-Run, Ke-Jing Ran, Wen, Jinsheng, Yu, Weiqiang
Format: Article
Language:English
Subjects:
Crystals
Dielectric strength
Dielectrics
Honeycomb construction
Magnetic transitions
Permittivity
Phase transitions
Ruthenium trichloride
Single crystals
Spin-orbit interactions
Transition temperature
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Summary:\(\alpha\)-RuCl\(_3\) is a Mott insulator with a honeycomb lattice with strong spin-orbit coupling. We report dielectric measurements on \(\alpha\)-RuCl\(_3\) single crystals under field. At zero field, the dielectric constant, \(\epsilon\), drops rapidly when cooled through the magnetic transition temperature T\(_N\). With increasing field, the onset of the drop in \(\epsilon\) tracks the T\(_N\). Such behavior is absent with field above a critical value H\(_c\) ~ 7.5 T, indicating the onset of a quantum phase transition. Our data suggest that the dielectric constant can be used as a probe of magnetic ordering in \(\alpha\)-RuCl\(_3\), and \(\alpha\)-RuCl\(_3\) is a possible type-II multiferroics.
ISSN:2331-8422
DOI:10.48550/arxiv.1801.08277