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Title: The curious case of cuprous chloride: Giant thermal resistance and anharmonic quasiparticle spectra driven by dispersion nesting

Abstract

Strongly anharmonic phonon properties of CuCl are investigated with inelastic neutron-scattering measurements and first-principles simulations. An unusual quasiparticle spectral peak emerges in the phonon density of states with increasing temperature, in both simulations and measurements, emanating from exceptionally strong coupling between conventional phonon modes. Associated with this strong anharmonicity, the lattice thermal conductivity of CuCl is extremely low and exhibits anomalous, nonmonotonic pressure dependence. We show how this behavior arises from the structure of the phonon dispersions augmenting the phase space available for anharmonic three-phonon scattering processes, and contrast this mechanism with common arguments based on negative Grüneisen parameters. These results demonstrate the importance of considering intrinsic phonon-dispersion structure toward understanding scattering processes and designing new ultralow thermal conductivity materials.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1476537
Alternate Identifier(s):
OSTI ID: 1378399
Grant/Contract Number:  
AC02-05CH11231; SC0014607
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 10; Related Information: © 2017 American Physical Society.; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Mukhopadhyay, Saikat, Bansal, Dipanshu, Delaire, Olivier, Perrodin, Didier, Bourret-Courchesne, Edith, Singh, David J., and Lindsay, Lucas. The curious case of cuprous chloride: Giant thermal resistance and anharmonic quasiparticle spectra driven by dispersion nesting. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.100301.
Mukhopadhyay, Saikat, Bansal, Dipanshu, Delaire, Olivier, Perrodin, Didier, Bourret-Courchesne, Edith, Singh, David J., & Lindsay, Lucas. The curious case of cuprous chloride: Giant thermal resistance and anharmonic quasiparticle spectra driven by dispersion nesting. United States. doi:10.1103/PhysRevB.96.100301.
Mukhopadhyay, Saikat, Bansal, Dipanshu, Delaire, Olivier, Perrodin, Didier, Bourret-Courchesne, Edith, Singh, David J., and Lindsay, Lucas. Fri . "The curious case of cuprous chloride: Giant thermal resistance and anharmonic quasiparticle spectra driven by dispersion nesting". United States. doi:10.1103/PhysRevB.96.100301. https://www.osti.gov/servlets/purl/1476537.
@article{osti_1476537,
title = {The curious case of cuprous chloride: Giant thermal resistance and anharmonic quasiparticle spectra driven by dispersion nesting},
author = {Mukhopadhyay, Saikat and Bansal, Dipanshu and Delaire, Olivier and Perrodin, Didier and Bourret-Courchesne, Edith and Singh, David J. and Lindsay, Lucas},
abstractNote = {Strongly anharmonic phonon properties of CuCl are investigated with inelastic neutron-scattering measurements and first-principles simulations. An unusual quasiparticle spectral peak emerges in the phonon density of states with increasing temperature, in both simulations and measurements, emanating from exceptionally strong coupling between conventional phonon modes. Associated with this strong anharmonicity, the lattice thermal conductivity of CuCl is extremely low and exhibits anomalous, nonmonotonic pressure dependence. We show how this behavior arises from the structure of the phonon dispersions augmenting the phase space available for anharmonic three-phonon scattering processes, and contrast this mechanism with common arguments based on negative Grüneisen parameters. These results demonstrate the importance of considering intrinsic phonon-dispersion structure toward understanding scattering processes and designing new ultralow thermal conductivity materials.},
doi = {10.1103/PhysRevB.96.100301},
journal = {Physical Review B},
number = 10,
volume = 96,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 2017},
month = {Fri Sep 01 00:00:00 EDT 2017}
}

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Cited by: 2 works
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Works referenced in this record:

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