| Original Articles |
|
|
|
|
Dynamic Localization of a One-Dimensional Quantum Dot Array in an ac Electric Field |
| LUO Ying1,2;DUAN Su-Qing2;FAN Wen-Bin2,3;ZAO Xian-Geng2;WANG Li-Min1;MA Ben-Kun1 |
| 1Department of Physics and Institute of Theoretical Physics, Beijing Normal University Beijing 100875
2Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing 100088
3State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
|
|
| Cite this article: |
|
LUO Ying, DUAN Su-Qing, FAN Wen-Bin et al 2002 Chin. Phys. Lett. 19 981-984 |
|
|
|
Abstract We investigate the dynamics of two interaction electrons confined to one-dimensional quantum dot array in an ac electric field. We find that initially localized electrons will maintain localized in the absence of Coulomb interaction if the ratio of the ac field magnitude to the frequency is a root of the ordinary zero-order Bessel function. In contrast to the case without Coulomb interaction, no matter what the value is, the electrons are delocalized and the delocalization effect depends on the ratio U/ω and eaE/ω, where U is the strength of Coulomb interaction, a is the lattice constant, and E and ω are the ac field amplitude and frequency, respectively.
|
| Keywords:
73.21.-b
72.15.Rn
33.80.Be
|
|
|
Published: 01 July 2002
|
|
| PACS: |
73.21.-b
|
(Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems)
|
| |
72.15.Rn
|
(Localization effects (Anderson or weak localization))
|
| |
33.80.Be
|
(Level crossing and optical pumping)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
