Mobility limited by cluster scattering in ternary alloy quantum wires  

作　　者：张恒 杨少延 刘贵鹏 王建霞 金东东 李辉杰 刘祥林 朱勤生 王占国 

机构地区：[1]Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences [2]Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Institute of Semiconductors,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2014年第1期407-411,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.91233111,61274041,11275228,61006004,and 61076001);the National Basic Research Program of China(Grant No.2012CB619305);the High Technology R&D Program of China(Grant No.2011AA03A101)

摘　　要：The mobility limited by cluster scattering in ternary alloy semiconductor quantum wire （QWR） is theoretically inves- tigated under Born approximation. We calculate the screened mobility due to clusters （high indium composition lnGaN） scattering in the InxGal_xN QWR structure. The characteristics of the cluster scattering mechanism are discussed in terms of the indium composition of clusters, the one-dimensional electron gas （1DEG） concentration, and the radius of QWR. We find that the density, breadth of cluster, and the correlation length have a strong effect on the electron mobility due to cluster scattering, Finally, a comparison of the cluster scattering is made with the alloy-disorder scattering. It is found that the cluster scattering acts as a significant scattering event to impact the resultant electron mobility in ternary alloy QWR.The mobility limited by cluster scattering in ternary alloy semiconductor quantum wire （QWR） is theoretically inves- tigated under Born approximation. We calculate the screened mobility due to clusters （high indium composition lnGaN） scattering in the InxGal_xN QWR structure. The characteristics of the cluster scattering mechanism are discussed in terms of the indium composition of clusters, the one-dimensional electron gas （1DEG） concentration, and the radius of QWR. We find that the density, breadth of cluster, and the correlation length have a strong effect on the electron mobility due to cluster scattering, Finally, a comparison of the cluster scattering is made with the alloy-disorder scattering. It is found that the cluster scattering acts as a significant scattering event to impact the resultant electron mobility in ternary alloy QWR.

关 键 词：MOBILITY cluster scattering quantum wire one-dimensional electron gas 

分 类 号：O471.1[理学—半导体物理]