Grüneisen parameters and thermal conductivity in the phase change compound GeTe
| Autor: | Gabriele C. Sosso, Emanuele Bosoni, Marco Bernasconi |
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| Přispěvatelé: | Bosoni, E, Sosso, G, Bernasconi, M |
| Rok vydání: | 2017 |
| Předmět: |
Work (thermodynamics)
Atomic and Molecular Physics and Optic Materials science Condensed matter physics Electronic Optical and Magnetic Material Solid-state Density-functional theory 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Boltzmann equation Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Phase change Thermal conductivity Modeling and Simulation 0103 physical sciences Phonon Electrical and Electronic Engineering Perturbation theory 010306 general physics 0210 nano-technology FIS/03 - FISICA DELLA MATERIA Phase change material |
| Zdroj: | Journal of Computational Electronics. 16:997-1002 |
| ISSN: | 1572-8137 1569-8025 |
| Popis: | Thermal conductivity is one of the key properties for the application of phase change materials in nonvolatile memories. In this work we compute the mode Grüneisen parameters of the phase change compound GeTe by means of density-functional perturbation theory. The Grüneisen parameters are then used to estimate the bulk thermal conductivity with a phenomenological formula (Slack in Solid State Phys 34:1–71, 1979). This estimate is compared with the full solution of the Boltzmann Transport Equation we obtained in a previous work within the same theoretical framework. This comparison allowed us to validate the phenomenological formula also for the prototypical phase change compound GeTe. |
| Databáze: | OpenAIRE |
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