| Original Articles |
|
|
|
|
Resonant Photon-Assisted Structure of Conductance through a Quantum Wire |
| LIAO Wen-Hu;ZHOU Guang-Hui |
| Department of Physics, Hu’nan Normal University, Changsha 410081
International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015 |
|
| Cite this article: |
|
LIAO Wen-Hu, ZHOU Guang-Hui 2005 Chin. Phys. Lett. 22 2922-2925 |
|
|
|
Abstract We investigate theoretically the electron transport properties of a two-sublevel quantum wire irradiated by a strong laser field resonant with the quasiparticle transition at low temperatures. Using the method of the Keldysh equation of motion for nonequilibrium Green function, we examine the time-averaged conductance for the system with photon polarization parallel and perpendicular to the tunnelling current direction, respectively. We demonstrate that, by analysing some numerical examples, a feature of absolute negative conductance appears in the parallel case, while the conductance shows a symmetry distributed peaks in the perpendicular case.
|
| Keywords:
73.23.-b
73.21.Hb
67.Lt
|
|
|
Published: 01 November 2005
|
|
| PACS: |
73.23.-b
|
(Electronic transport in mesoscopic systems)
|
| |
73.21.Hb
|
(Quantum wires)
|
| |
78
|
(Optical properties, condensed-matter spectroscopy and other interactions of radiation and particles with condensed matter )
|
| |
67.Lt
|
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
