標題: | Effects of incoherent processes on the quantum transport through a finite-range time-modulated potential |
作者: | Liang, HC Chu, CS 電子物理學系 Department of Electrophysics |
公開日期: | 1-二月-2001 |
摘要: | We study the effect of phase randomization on the quantum transport through a finite-range time-modulated potential. The time-modulated potential leads only to coherent inelastic scatterings, and the incoherent processes are described by an S-matrix model proposed originally by Buttiker for the case of time-independent transport. This S-matrix model provides us a systematic way to reinject into the system those electrons that have suffered with incoherent scatterings. The distribution of these reinjected electrons is determined by an effective chemical potential <(<mu>)over tilde>. For comparison, we study the cases where the incoherent processes occur inside and outside the time-modulated region. The incoherent processes are found to broaden and to smear the structures in the conductance G that are associated with the coherent inelastic scatterings. However, the smearing is more effective when the incoherent processes occur inside the time-modulated potential region. |
URI: | http://hdl.handle.net/11536/29869 |
ISSN: | 0577-9073 |
期刊: | CHINESE JOURNAL OF PHYSICS |
Volume: | 39 |
Issue: | 1 |
起始頁: | 64 |
結束頁: | 74 |
顯示於類別: | 期刊論文 |