Inelastic x-ray scattering measurements of phonon dynamics in
Journal Article
·
· Physical Review B
We report 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. 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.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1368071
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 7 Vol. 93; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu 2 Si 2
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journal | January 2020 |
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