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Reentrant incommensurate order and anomalous magnetic torque in the Kitaev magnet β−Li2IrO3

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posted on 02.09.2020 by Mengqun Li, Ioannis Rousochatzakis, Natalia B Perkins
We present a theoretical study of the response of $\beta$-$\text{Li}_2\text{IrO}_3$ under external magnetic fields in the $ab$, $bc$ and $ac$ crystallographic planes. The results are based on the minimal nearest-neighbor $J$-$K$-$\Gamma$ model and reveal a rich intertwining of field-induced phases and magnetic phase transitions with distinctive signatures that can be probed directly via torque magnetometry. Most saliently, we observe: i) an unusual reentrance of the incommensurate counter-rotating order for fields in the $ab$-plane, and ii) a set of abrupt torque discontinuities which are particularly large for fields rotating in the $bc$ plane, and whose characteristic shape resembles closely the ones observed in the 3D Kitaev magnet $\gamma$-$\text{Li}_2\text{IrO}_3$. An experimental confirmation of these predictions will pave the way for an accurate determination of all relevant microscopic parameters of this 3D Kitaev magnet.

Funding

US Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0018056.

History

School

  • Science

Department

  • Physics

Published in

Physical Review Research

Volume

2

Issue

3

Publisher

American Physical Society (APS)

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by the American Physical Society under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

16/07/2020

Publication date

2020-08-28

Copyright date

2020

eISSN

2643-1564

Language

en

Depositor

Dr Ioannis Rousochatzakis. Deposit date: 28 August 2020

Article number

033328

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