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About the Definition of the Local Equilibrium Lattice Temperature in Suspended Monolayer Graphene

التفاصيل البيبلوغرافية
العنوان: About the Definition of the Local Equilibrium Lattice Temperature in Suspended Monolayer Graphene
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
الوصف
تدمد:10994300
DOI:10.3390/e23070873