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Oh, Yoon Seok
Laboratory for Strong Correlation in Quantum Materials
Research Interests
  • Multiferroic
  • Ferroelectric
  • Quantum Magnetism

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Phonon thermal transport of URu2Si2: broken translational symmetry and strong-coupling of the “hidden order” to the lattice

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Title
Phonon thermal transport of URu2Si2: broken translational symmetry and strong-coupling of the “hidden order” to the lattice
Author
Sharma, PAHarrison, NJaime, MOh, Yoon SeokKim, KHBatista, CDAmitsuka, HMydosh, JA
Keywords
Hidden order (HO) state; Phonon conduction; Thermal Hall conductivity; Translational symmetry
Issue Date
2006-10
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.97, no.15, pp.156401 -
Abstract
A dramatic increase in the total thermal conductivity (κ) is observed in the hidden order (HO) state of single crystal URu2Si2. Through measurements of the thermal Hall conductivity, we explicitly show that the electronic contribution to κ is extremely small, so that this large increase in κ is dominated by phonon conduction. An itinerant BCS or mean-field model describes this behavior well: the increase in κ is associated with the opening of a large energy gap at the Fermi surface, thereby decreasing electron-phonon scattering. Our analysis implies that the "hidden order" parameter is strongly coupled to the lattice, suggestive of a broken symmetry involving charge degrees of freedom. © 2006 The American Physical Society.
URI
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DOI
10.1103/PhysRevLett.97.156401
ISSN
0031-9007
Appears in Collections:
PHY_Journal Papers
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