scholarly journals Scaling of exciton binding energy with external dielectric function in carbon nanotubes

2008 ◽  
Vol 40 (7) ◽  
pp. 2375-2379 ◽  
Author(s):  
Andrew G. Walsh ◽  
A. Nickolas Vamivakas ◽  
Yan Yin ◽  
Stephen B. Cronin ◽  
M. Selim Ünlü ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Binding Energy ◽  
Dielectric Function ◽  
Exciton Binding Energy

EXCITONS IN SINGLE-WALL CARBON NANOTUBES

2003 ◽  
Vol 02 (06) ◽  
pp. 521-526 ◽  
Author(s):  
K. A. BULASHEVICH ◽  
R. A. SURIS ◽  
S. V. ROTKIN
Keyword(s):  
Carbon Nanotubes ◽  
Binding Energy ◽  
Dielectric Function ◽  
Energy Gap ◽  
Random Phase ◽  
Tight Binding ◽  
Exciton Binding Energy ◽  
Single Wall Carbon Nanotubes ◽  
Tight Binding Approximation ◽  
Single Wall Carbon

Excitonic states in single-wall carbon nanotubes have been studied within the tight-binding approximation. An analytical expression for the dielectric function of the nanotube has been obtained in the random phase approximation. It was demonstrated that calculations with the static dielectric function yield an overestimated exciton binding energy exceeding the nanotube energy gap. Self-consistent calculation of the exciton binding energy with the frequency-dependent dielectric function has been performed. The binding energy to energy gap ratio has been shown to have no dependence on the nanotube radius and to be a universal constant ~0.87 for given resonance integral γ0=2.7 eV .

Exciton Binding Energy in Semiconducting Single-Walled Carbon Nanotubes

2005 ◽  
Vol 109 (33) ◽  
pp. 15671-15674 ◽  
Author(s):  
Ying-Zhong Ma ◽  
Leonas Valkunas ◽  
Sergei M. Bachilo ◽  
Graham R. Fleming
Keyword(s):  
Carbon Nanotubes ◽  
Binding Energy ◽  
Single Walled Carbon Nanotubes ◽  
Exciton Binding Energy ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Photocurrent Quantum Yield of Semiconducting Carbon Nanotubes: Dependence on Excitation Energy and Exciton Binding Energy

2014 ◽  
Vol 118 (31) ◽  
pp. 18059-18063 ◽  
Author(s):  
Said Kazaoui ◽  
Steffan Cook ◽  
Nicolas Izard ◽  
Yoichi Murakami ◽  
Shigeo Maruyama ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Binding Energy ◽  
Quantum Yield ◽  
Excitation Energy ◽  
Exciton Binding Energy

Observations and calculations of the exciton binding energy in (In,Ga)As/GaAs strained-quantum-well heterostructures

1990 ◽  
Vol 41 (2) ◽  
pp. 1090-1094 ◽  
Author(s):  
Karen J. Moore ◽  
Geoffrey Duggan ◽  
Karl Woodbridge ◽  
Christine Roberts
Keyword(s):  
Binding Energy ◽  
Quantum Well ◽  
Exciton Binding Energy ◽  
Strained Quantum Well
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