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Title: Inelastic x-ray scattering measurements of phonon dynamics in URu2Si2

Abstract

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.

Authors:
 [1];  [1];  [1];  [2];  [2];  [3];  [4];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  3. McMaster Univ., Hamilton, ON (Canada); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. McMaster Univ., Hamilton, ON (Canada)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1302920
Alternate Identifier(s):
OSTI ID: 1237785
Grant/Contract Number:  
AC05-00OR22725; FG02-07ER46134; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 7; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Gardner, D. R., Bonnoit, C. J., Chisnell, R., Said, A. H., Leu, B. M., Williams, Travis J., Luke, G. M., and Lee, Y. S. Inelastic x-ray scattering measurements of phonon dynamics in URu2Si2. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.075123.
Gardner, D. R., Bonnoit, C. J., Chisnell, R., Said, A. H., Leu, B. M., Williams, Travis J., Luke, G. M., & Lee, Y. S. Inelastic x-ray scattering measurements of phonon dynamics in URu2Si2. United States. https://doi.org/10.1103/PhysRevB.93.075123
Gardner, D. R., Bonnoit, C. J., Chisnell, R., Said, A. H., Leu, B. M., Williams, Travis J., Luke, G. M., and Lee, Y. S. Thu . "Inelastic x-ray scattering measurements of phonon dynamics in URu2Si2". United States. https://doi.org/10.1103/PhysRevB.93.075123. https://www.osti.gov/servlets/purl/1302920.
@article{osti_1302920,
title = {Inelastic x-ray scattering measurements of phonon dynamics in URu2Si2},
author = {Gardner, D. R. and Bonnoit, C. J. and Chisnell, R. and Said, A. H. and Leu, B. M. and Williams, Travis J. and Luke, G. M. and Lee, Y. S.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.93.075123},
journal = {Physical Review B},
number = 7,
volume = 93,
place = {United States},
year = {Thu Feb 11 00:00:00 EST 2016},
month = {Thu Feb 11 00:00:00 EST 2016}
}

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Cited by: 5 works
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Works referenced in this record:

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Works referencing / citing this record:

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu 2 Si 2
journal, January 2020

  • Mydosh, J. A.; Oppeneer, P. M.; Riseborough, P. S.
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