Anharmonic lattice dynamics and superionic transition in AgCrSe 2
| العنوان: | Anharmonic lattice dynamics and superionic transition in AgCrSe 2 |
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| المؤلفون: | Douglas L. Abernathy, Gaurav Arya, Xing He, Andrew F. May, Olivier Delaire, Yang Ren, Jennifer L. Niedziela, Ahmet Alatas, Jingxuan Ding, Dipanshu Bansal, Georg Ehlers, Ayman Said, J. Wang |
| المصدر: | Proceedings of the National Academy of Sciences. 117:3930-3937 |
| بيانات النشر: | Proceedings of the National Academy of Sciences, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, Multidisciplinary, Condensed matter physics, Scattering, Phonon, Anharmonicity, Fast ion conductor, Quasiparticle, Energy landscape, Thermal conduction, Thermoelectric materials |
| الوصف: | Significance Unveiling the unusual atomic dynamics in superionic conductors is critical for the design of energy conversion and storage materials, for example to rationalize their thermal transport properties in thermoelectric applications or their fast ionic conductivity in solid-state electrolytes. We combine neutron/X-ray scattering techniques with first-principles calculations to discover hybrid lattice dynamics in A g C r S e 2 , where the phonon wavelength controls the breakdown of transverse acoustic modes in the superionic phase. We attribute the ultralow thermal conductivity to strong phonon anharmonicity combined with disorder in the Ag sublattice. This understanding provides insights into the thermal conduction mechanism in superionic conductors and sheds light on the role of lattice dynamics in the emergence of superionic behavior. |
| تدمد: | 1091-6490 0027-8424 |
| DOI: | 10.1073/pnas.1913916117 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::903fb87bba730d078f22aa49f121f635 https://doi.org/10.1073/pnas.1913916117 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........903fb87bba730d078f22aa49f121f635 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10916490 00278424 |
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| DOI: | 10.1073/pnas.1913916117 |