This title appears in the Scientific Report :
2015
Please use the identifier:
http://hdl.handle.net/2128/8877 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.91.224304 in citations.
Quenching rattling modes in skutterudites with pressure
Quenching rattling modes in skutterudites with pressure
A high-pressure study of the lattice dynamics in the filled skutterudite Eu0.84Fe4Sb12 was carried out by means of x-ray powder diffraction and nuclear inelastic scattering. The anharmonicity of particular phonon modes was characterized by mode and element specific Grüneisen parameters. The large an...
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Personal Name(s): | Sergueev, I. (Corresponding Author) |
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Glazyrin, K. / Kantor, I. / McGuire, M. A. / Chumakov, A. I. / Klobes, B. / Sales, B. C. / Hermann, Raphael | |
Contributing Institute: |
Streumethoden; JCNS-2 JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Physical Review B Physical review / B, 91 91 (2015 2015) 22 22, S. 224304 224304 |
Imprint: |
College Park, Md.
APS
2015
|
DOI: |
10.1103/PhysRevB.91.224304 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Hybrid and Functionalised Structures Controlling Collective States |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.91.224304 in citations.
A high-pressure study of the lattice dynamics in the filled skutterudite Eu0.84Fe4Sb12 was carried out by means of x-ray powder diffraction and nuclear inelastic scattering. The anharmonicity of particular phonon modes was characterized by mode and element specific Grüneisen parameters. The large anharmonicity of the rattling optical mode that is hybridized with the acoustical phonons at ambient pressure is reduced at high pressure as the phonon modes decouple. This result suggests that anharmonic coupling between acoustic and optical phonon modes plays a central role in the reduced thermal conductivity. |