Charge and Phonon Transport in Suspended Monolayer Graphene

2020 ◽  
pp. 115-123
Author(s):  
Marco Coco ◽  
Giovanni Mascali ◽  
Vittorio Romano
Keyword(s):  
Phonon Transport ◽  
Monolayer Graphene

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

Entropy ◽  
2021 ◽  
Vol 23 (7) ◽  
pp. 873
Author(s):  
Marco Coco ◽  
Giovanni Mascali ◽  
Vittorio Romano
Keyword(s):  
Statistical Physics ◽  
Local Equilibrium ◽  
Collision Operator ◽  
Phonon Transport ◽  
Entropy Density ◽  
Lattice Temperature ◽  
Monolayer Graphene ◽  
Homogeneous Case ◽  
Local Lattice ◽  
Definition Of

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.

Hierarchical structures lead to high thermoelectric performance in Cum+nPb100SbmTe100Se2m (CLAST)

2021 ◽  
Author(s):  
Siqi Wang ◽  
Yu Xiao ◽  
Yongjin Chen ◽  
Shang Peng ◽  
Dongyang Wang ◽  
...  
Keyword(s):  
Hierarchical Structures ◽  
Phonon Transport ◽  
Thermoelectric Performance

Hierarchical microstructures lead to high thermoelectric performance in Cum+nPb100SbmTe100Se2m (CLAST) through synergistically optimizing carrier and phonon transport.

THE ATOMISTIC GREEN'S FUNCTION METHOD FOR INTERFACIAL PHONON TRANSPORT

2014 ◽  
Vol 17 (N/A) ◽  
pp. 89-145 ◽  
Author(s):  
Sridhar Sadasivam ◽  
Yuhang Che ◽  
Zhen Huang ◽  
Liang Chen ◽  
Satish Kumar ◽  
...  
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Function Method ◽  
Phonon Transport ◽  
Green’S Function Method

scholarly journals Structural imaging of nanoscale phonon transport in ferroelectrics excited by metamaterial-enhanced terahertz fields

2017 ◽  
Vol 1 (6) ◽  
Author(s):  
Yi Zhu ◽  
Frank Chen ◽  
Joonkyu Park ◽  
Kiran Sasikumar ◽  
Bin Hu ◽  
...  
Keyword(s):  
Phonon Transport ◽  
Structural Imaging ◽  
Terahertz Fields
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