Inelastic x-ray scattering measurements of phonon dynamics in URu2Si2 [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2016. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- 075,123 : digital, PDF file
- Additional Creators:
- Oak Ridge National Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- In this paper, we study high-resolution inelastic x-ray scattering measurements of the acoustic phonons of URu2Si2. At all temperatures, the longitudinal acoustic phonon linewidths are anomalously broad at small wave vectors revealing a previously unknown anharmonicity. The phonon modes do not change significantly upon cooling into the hidden order phase. In addition, our data suggest that the increase in thermal conductivity in the hidden order phase cannot be driven by a change in phonon dispersions or lifetimes. Hence, the phonon contribution to the thermal conductivity is likely much less significant compared to that of the magnetic excitations in the low temperature phase.
- Published through SciTech Connect., 02/11/2016., Physical Review B 93 7 ISSN 2469-9950 AM, and D. R. Gardner; C. J. Bonnoit; R. Chisnell; A. H. Said; B. M. Leu; Travis J. Williams; G. M. Luke; Y. S. Lee.
- Funding Information:
- AC05-00OR22725, FG02-07ER46134, and AC02-06CH11357
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