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Oh, Yoon Seok
Laboratory for Strong Correlation in Quantum Materials
Research Interests
  • Materials for Quantum Information Processing, Transport, and Storage
  • Quantum Magnet
  • Multiferroic

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Giant Magnetic Fluctuations at the Critical Endpoint in Insulating HoMnO3

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Title
Giant Magnetic Fluctuations at the Critical Endpoint in Insulating HoMnO3
Author
Choi, YJLee, NSharma, PAKim, SBVajk, OPLynn, JWOh, Yoon SeokCheong, SW
Keywords
Antiferromagnets; Critical end-point; Critical fluctuations; Critical phenomenon; Itinerant magnets; Magnetic fluctuation; Quantum criticality
Issue Date
2013-04
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.110, no.15, pp.157202 -
Abstract
Although abundant research has focused recently on the quantum criticality of itinerant magnets, critical phenomena of insulating magnets in the vicinity of critical endpoints (CEP's) have rarely been revealed. Here we observe an emergent CEP at 2.05 T and 2.2 K with a suppressed thermal conductivity and concomitant strong critical fluctuations evident via a divergent magnetic susceptibility (e.g., χ′′(2.05 T,2.2 K)/χ′′(3 T,2.2 K)≈23,500%, comparable to the critical opalescence in water) in the hexagonal insulating antiferromagnet HoMnO3. © 2013 American Physical Society.
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DOI
10.1103/PhysRevLett.110.157202
ISSN
0031-9007
Appears in Collections:
PHY_Journal Papers
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