دورية أكاديمية
About the Definition of the Local Equilibrium Lattice Temperature in Suspended Monolayer Graphene
العنوان: | About the Definition of the Local Equilibrium Lattice Temperature in Suspended Monolayer Graphene |
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المؤلفون: | Marco Coco, Giovanni Mascali, Vittorio Romano |
المصدر: | Entropy, Vol 23, Iss 7, p 873 (2021) |
بيانات النشر: | MDPI AG, 2021. |
سنة النشر: | 2021 |
المجموعة: | LCC:Science LCC:Astrophysics LCC:Physics |
مصطلحات موضوعية: | local equilibrium temperature, electron–phonon transport, graphene, macroscopic models, maximum entropy principle, Science, Astrophysics, QB460-466, Physics, QC1-999 |
الوصف: | The definition of temperature in non-equilibrium situations is among the most controversial questions in thermodynamics and statistical physics. In this paper, by considering two numerical experiments simulating charge and phonon transport in graphene, two different definitions of local lattice temperature are investigated: one based on the properties of the phonon–phonon collision operator, and the other based on energy Lagrange multipliers. The results indicate that the first one can be interpreted as a measure of how fast the system is trying to approach the local equilibrium, while the second one as the local equilibrium lattice temperature. We also provide the explicit expression of the macroscopic entropy density for the system of phonons, by which we theoretically explain the approach of the system toward equilibrium and characterize the nature of the equilibria, in the spatially homogeneous case. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1099-4300 |
Relation: | https://www.mdpi.com/1099-4300/23/7/873; https://doaj.org/toc/1099-4300 |
DOI: | 10.3390/e23070873 |
URL الوصول: | https://doaj.org/article/fba56a6c1ffe4c238a09f9f75fa6ba25 |
رقم الأكسشن: | edsdoj.fba56a6c1ffe4c238a09f9f75fa6ba25 |
قاعدة البيانات: | Directory of Open Access Journals |
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