Resonant Photon-Assisted Structure of Conductance through a Quantum Wire  

作　　者：廖文虎 周光辉 

机构地区：[1]Department of Physics, Hu'nan Normal University, Changsha 410081 [2]International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015

出　　处：《Chinese Physics Letters》2005年第11期2922-2925,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10574042, and the Research Foundation of Hunan Education Commission under Grant No 04A031.

摘　　要：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 Derpendicular case.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 Derpendicular case.

关 键 词：ELECTRONIC TRANSPORT EXCITED-STATE GROUND-STATE SIDE-BAND DOT 

分 类 号：O43[机械工程—光学工程]