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Relation between Kitaev magnetism and structure in alpha-RuCl3

Title
Relation between Kitaev magnetism and structure in alpha-RuCl3
Authors
Glamazda, A.Lemmens, P.Do, S. -H.Kwon, Y. S.Choi, K. -Y.
DGIST Authors
Kwon, Y. S.
Issue Date
2017-05-18
Citation
Physical Review B, 95(17)
Type
Article
Article Type
Article
Keywords
CrCl3DiffractionHoneycombIridateVibrational Spectra
ISSN
2469-9950
Abstract
Raman scattering has been employed to investigate lattice and magnetic excitations of the honeycomb Kitaev material α-RuCl3 and its Heisenberg counterpart CrCl3. Our phonon Raman spectra give evidence for a first-order structural transition from a monoclinic to a rhombohedral structure for both compounds. Significantly, only α-RuCl3 features a large thermal hysteresis, consistent with the formation of a wide phase of coexistence. In the related temperature interval of 70-170 K, we observe a hysteretic behavior of magnetic excitations as well. The stronger magnetic response in the rhombohedral compared to the monoclinic phase evidences a coupling between the crystallographic structure and low-energymagnetic response. Our results demonstrate that the Kitaev magnetism concomitant with fractionalized excitations is susceptible to small variations of bonding geometry. © 2017 American Physical Society.
URI
http://hdl.handle.net/20.500.11750/5004
DOI
10.1103/PhysRevB.95.174429
Publisher
American Physical Society
Related Researcher
  • Author Kwon, Yong Seung Quantum Functional Materials Laboratory
  • Research Interests High Tc Superconductors and magnetic materials; Thermoelectric Materials
Files:
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Collection:
Department of Emerging Materials ScienceQuantum Functional Materials Laboratory1. Journal Articles


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