Electron-phonon coupling mechanism in two-dimensional graphite and single-wall carbon nanotubes

2007 ◽  
Vol 75 (15) ◽  
Author(s):  
Ge. G. Samsonidze ◽  
E. B. Barros ◽  
R. Saito ◽  
J. Jiang ◽  
G. Dresselhaus ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Coupling Mechanism ◽  
Two Dimensional ◽  
Phonon Coupling ◽  
Single Wall Carbon ◽  
Electron Phonon Coupling

Band-Gap Modulation and Kohn Anomalies in Two-Dimensional Graphite and Single-Wall Carbon Nanotubes

2006 ◽  
Vol 963 ◽  
Author(s):  
Georgii Samsonidze ◽  
Eduardo B. Barros ◽  
Hyungbin Son ◽  
Riichiro Saito ◽  
Gene Dresselhaus ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Band Gap ◽  
Graphene Sheet ◽  
Phonon Mode ◽  
Single Wall Carbon Nanotubes ◽  
Two Dimensional ◽  
Phonon Modes ◽  
Single Wall Carbon ◽  
Electron Phonon Coupling ◽  
Band Gap Modulation

ABSTRACTThe electron-phonon coupling in two-dimensional graphite (graphene sheet) and metallic single-wall carbon nanotubes (SWNTs) is analyzed. In the graphene sheet the G-band phonon mode induces oscillations of the Fermi points, while the G′-band phonon mode opens a dynamical (oscillating with the phonon frequency) band gap, and accordingly, both phonon modes exhibit Kohn anomalies. Similarly, truly metallic armchair SWNTs undergo Peierls transitions driven by the G−- and G′-band phonon modes both of which open a dynamical band gap. In addition, the dynamical band gap induces a non-linear dependence of the phonon frequencies on the doping level and gives rise to strong anharmonic effects in the graphene sheet and metallic SWNTs.

Exciton-phonon coupling strength in single wall carbon nanotubes

2009 ◽  
Vol 70 (4) ◽  
pp. 469-473 ◽  
Author(s):  
G. L. Yu ◽  
Q. L. Liang ◽  
Y. L. Jia ◽  
G. Tang
Keyword(s):  
Carbon Nanotubes ◽  
Coupling Strength ◽  
Single Wall Carbon Nanotubes ◽  
Phonon Coupling ◽  
Single Wall Carbon

Thermopower of low-dimensional structures: The effect of electron–phonon coupling

2017 ◽  
Author(s):  
M. Tsaousidou
Keyword(s):  
Quantum Wires ◽  
Single Wall Carbon Nanotubes ◽  
Two Dimensional ◽  
Phonon Drag ◽  
Phonon Coupling ◽  
Electron Gases ◽  
Theoretical Approaches ◽  
Electron Phonon Coupling ◽  
Low Dimensional

This article examines the effect of electron-phonon coupling on the thermopower of low-dimensional structures. It begins with a review of the theoretical approaches and the basic concepts regarding phonon drag under different transport regimes in two- and one-dimensional systems. It then considers the thermopower of two-dimensional semiconductor structures, focusing on phonon drag in semi-classical two-dimensional electron gases confined in semiconductor nanostructures. It also analyzes the influence of phonon drag on the thermopower of semiconductor quantum wires and describes the phonon-drag thermopower of doped single-wall carbon nanotubes. The article compares theory and experiment in order to demonstrate the role of phonon-drag and electron-phonon coupling in the thermopower in two and one dimensions.

Estimation of the mechanical properties of nanocomposites based on the properties prediction of single wall carbon nanotubes (SWCNT)

2015 ◽  
Vol 57 (5) ◽  
pp. 447-457 ◽  
Author(s):  
Hassan S. Hedia ◽  
Saad M. Aldousari ◽  
Ahmed K. Abdellatif ◽  
Gamal S. Abdelhaffez
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon
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