Effects of environmental and exciton screening in single-walled carbon nanotubes

被引：9
|
作者：
Adamyan, Vadym M. [1 ]
Smyrnov, Oleksii A. [1 ]
Tishchenko, Sergey V. [1 ]
机构：
[1] Odessa II Mechnikov Natl Univ, Dept Theoret Phys, UA-65026 Odessa, Ukraine
来源：
INTERNATIONAL CONFERENCE ON THEORETICAL PHYSICS 'DUBNA-NANO2008' | 2008年 / 129卷
关键词：
D O I：
10.1088/1742-6596/129/1/012012
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The ground-state exciton binding energy for single-walled carbon nanotubes (SWCNTs) in vacuum calculated ignoring the screening of Coulomb interaction appears to be much greater than the corresponding band gap. The most essential contributions to the screening of electron-hole (e-h) interaction potential in semiconducting SWCNTs, which return the ground-state exciton binding energy into the energy gap, are considered. Our estimates on the screening efiects and exciton binding energies are in satisfactory agreement with the corresponding experimental data for concrete nanotubes.
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页数：4
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