scholarly journals Reliability of Raman measurements of thermal conductivity of single-layer graphene due to selective electron-phonon coupling: A first-principles study

2016 ◽  
Vol 93 (12) ◽  
Author(s):  
Ajit K. Vallabhaneni ◽  
Dhruv Singh ◽  
Hua Bao ◽  
Jayathi Murthy ◽  
Xiulin Ruan
Keyword(s):  
Thermal Conductivity ◽  
First Principles ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Phonon Coupling ◽  
Layer Graphene ◽  
First Principles Study ◽  
Electron Phonon Coupling

Raman scattering and tunable electron–phonon coupling in single layer graphene

2007 ◽  
Vol 143 (1-2) ◽  
pp. 39-43 ◽  
Author(s):  
Jun Yan ◽  
Yuanbo Zhang ◽  
Sarah Goler ◽  
Philip Kim ◽  
Aron Pinczuk
Keyword(s):  
Raman Scattering ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Phonon Coupling ◽  
Layer Graphene ◽  
Electron Phonon Coupling

scholarly journals The electron–phonon coupling constant for single-layer graphene on metal substrates determined from He atom scattering

2021 ◽  
Author(s):  
Giorgio Benedek ◽  
Joseph R. Manson ◽  
Salvador Miret-Artés
Keyword(s):  
Single Layer ◽  
Waller Factor ◽  
Single Layer Graphene ◽  
Coupling Constant ◽  
Phonon Coupling ◽  
Metal Substrates ◽  
Layer Graphene ◽  
Atom Scattering ◽  
Debye Waller Factor ◽  
Electron Phonon Coupling

A theory, previously formulated for conducting surfaces, is extended to extract the electron-phonon coupling strength λ for graphene supported on metal substrates from the thermal attenuation (Debye–Waller factor) of helium scattering reflectivity.

Thermal Conductivity Reduction in Few-Layer Graphene

2011 ◽  
Author(s):  
Dhruv Singh ◽  
Jayathi Y. Murthy ◽  
Timothy S. Fisher
Keyword(s):  
Thermal Conductivity ◽  
Weak Coupling ◽  
Phonon Scattering ◽  
Single Layer ◽  
Acoustic Mode ◽  
Single Layer Graphene ◽  
Boltzmann Transport ◽  
Layer Graphene ◽  
Out Of Plane ◽  
Few Layer Graphene

Using the linearized Boltzmann transport equation and perturbation theory, we analyze the reduction in the intrinsic thermal conductivity of few-layer graphene sheets accounting for all possible three-phonon scattering events. Even with weak coupling between layers, a significant reduction in the thermal conductivity of the out-of-plane acoustic modes is apparent. The main effect of this weak coupling is to open many new three-phonon scattering channels that are otherwise absent in graphene. The highly restrictive selection rule that leads to a high thermal conductivity of ZA phonons in single-layer graphene is only weakly broken with the addition of multiple layers, and ZA phonons still dominate thermal conductivity. We also find that the decrease in thermal conductivity is mainly caused by decreased contributions of the higher-order overtones of the fundamental out-of-plane acoustic mode. Moreover, the extent of reduction is largest when going from single to bilayer graphene and saturates for four layers. The results compare remarkably well over the entire temperature range with measurements of of graphene and graphite.

scholarly journals First-principles study of electron-phonon coupling and magnetoresistance of LaBi under pressure

2020 ◽  
Vol 101 (15) ◽  
Author(s):  
Jian-Feng Zhang ◽  
Peng-Jie Guo ◽  
Miao Gao ◽  
Kai Liu ◽  
Zhong-Yi Lu
Keyword(s):  
First Principles ◽  
Phonon Coupling ◽  
First Principles Study ◽  
Electron Phonon Coupling
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