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Phonon considerations in the reduction of thermal conductivity in phononic crystals

التفاصيل البيبلوغرافية
العنوان: Phonon considerations in the reduction of thermal conductivity in phononic crystals
المؤلفون: Ihab El-Kady, Roy H. Olsson, Patrick E. Hopkins, Leslie M. Phinney, Peter T. Rakich
المصدر: Applied Physics A. 103:575-579
بيانات النشر: Springer Science and Business Media LLC, 2010.
سنة النشر: 2010
مصطلحات موضوعية: Materials science, Condensed matter physics, Silicon, Phonon, chemistry.chemical_element, General Chemistry, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Thermoelectric materials, Porous silicon, Crystal, Condensed Matter::Materials Science, Thermal conductivity, chemistry, Condensed Matter::Superconductivity, Thermoelectric effect, Condensed Matter::Strongly Correlated Electrons, General Materials Science, Porous medium
الوصف: Periodic porous structures offer unique material solutions to thermoelectric applications. With recent interest in phonon band gap engineering, these periodic structures can result in reduction of the phonon thermal conductivity due to coherent destruction of phonon modes characteristic in phononic crystals. In this paper, we numerically study phonon transport in periodic porous silicon phononic crystal structures. We develop a model for the thermal conductivity of phononic crystal that accounts for both coherent and incoherent phonon effects, and show that the phonon thermal conductivity is reduced to less than 4% of the bulk value for Si at room temperature. This has substantial impact on thermoelectric applications, where the efficiency of thermoelectric materials is inversely proportional to the thermal conductivity.
تدمد: 1432-0630
0947-8396
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::5980ef1b63074cacf26f87b605dd240a
https://doi.org/10.1007/s00339-010-6189-8
حقوق: OPEN
رقم الأكسشن: edsair.doi...........5980ef1b63074cacf26f87b605dd240a
قاعدة البيانات: OpenAIRE
الوصف
تدمد:14320630
09478396