|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Cross-polarized excitons in double-wall carbon nanotubes
| Title: | Cross-polarized excitons in double-wall carbon nanotubes |
| Authors: | Tomio, Yuh Browse this author | | Suzuura, Hidekatsu Browse this author →KAKEN DB | | Ando, Tsuneya Browse this author |
| Issue Date: | 15-Dec-2012 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review B |
| Volume: | 86 |
| Issue: | 24 |
| Start Page: | 245428 |
| Publisher DOI: | 10.1103/PhysRevB.86.245428 |
| Abstract: | Optical absorption in double-wall carbon nanotubes for light polarized perpendicular to the tube axis is studied by taking into account exciton effects and depolarization effects within an effective-mass theory. The Coulomb interaction is suppressed by not only intrawall screening effects but also interwall screening, leading to the reduction of exciton binding energies and band gaps. When two tubes are both semiconducting, a clear exciton peak still survives even under depolarization effects for the outer tube, but the exciton peak of the inner tube has an asymmetric Fano line shape due to the coupling with continuum states of the outer tube. When a double-wall nanotube contains a metallic tube, either inner or outer, the exciton of the semiconducting tube loses its peak structure under depolarization effects. |
| Rights: | ©2012 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/51780 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 冨尾 祐
|
