Chiral excitations and the intermediate-field regime in the Kitaev magnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>α</mml:mi><mml:mo>−</mml:mo><mml:msub><mml:mi>RuCl</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>-Reference-Cited by-同舟云学术

Chiral excitations and the intermediate-field regime in the Kitaev magnet α−RuCl3

Published:2024-04-05 Issue:2 Volume:6 Page:
ISSN:2643-1564
Container-title:Physical Review Research
language:en
Short-container-title:Phys. Rev. Research

Author:

Sahasrabudhe Anuja¹^ORCID,Prosnikov Mikhail A.²^ORCID,Koethe Thomas C.¹^ORCID,Stein Philipp¹^ORCID,Tsurkan Vladimir³⁴,Loidl Alois³^ORCID,Grüninger Markus¹^ORCID,Hedayat Hamoon¹^ORCID,van Loosdrecht Paul H. M.¹^ORCID

Affiliation:

1. Institute of Physics II, University of Cologne, 50937 Cologne, Germany

2. High Field Magnet Laboratory (HFML-EMFL), Radboud University, 6525 ED Nijmegen, The Netherlands

3. University of Augsburg, 86159 Augsburg, Germany

4. Institute of Applied Physics, MD 2028, Chisinau, Republic of Moldova

Abstract

In the Kitaev magnet α-RuCl3, the existence of a magnetic-field-induced quantum spin-liquid phase and of anyonic excitations is controversially discussed. We address this elusive, exotic phase via helicity-dependent Raman scattering and analyze the Raman optical activity of excitations as a function of magnetic field and temperature. The hotly debated field regime between 7.5 and 10.5T is characterized by clear spectroscopic signatures such as a plateau of the Raman optical activity of the dominant, chiral spin-flip excitation. This provides direct evidence for the existence of a distinct intermediate-field regime with an intriguing ground state featuring chiral excitations.

Published by the American Physical Society

2024

Funder

Deutsche Forschungsgemeinschaft

Agenția Națională pentru Cercetare și Dezvoltare

Publisher

American Physical Society (APS)

Link

http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevResearch.6.L022005/fulltext

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2. Chiral excitations and the intermediate-field regime in the Kitaev magnet α−RuCl3;Physical Review Research;2024-04-05