Fractal dimension study of polaron effects in cylindrical GaAs/AlxGa1-xAs core-shell nanowires  

作　　者：Hui Sun Hua Li Qiang Tian 

机构地区：[1]Department of Physics, Beijing Normal University, Beijing 100875, China [2]Department of Fundamentali Coursesl Academy of Armored Forces Engineering, Beijing 100072, China

出　　处：《Frontiers of physics》2018年第2期159-165,共7页物理学前沿（英文版）

摘　　要：Polaron effects in cylindrical GaAs/AlxGa1-xAs core-shell nanowires are studied by applying the fractal dimension method. In this paper, the polaron properties of GaAs/AlxGa1-xAs core-shell nanowires with different core radii and aluminum concentrations are discussed. The polaron binding energy, polaron mass shift, and fractal dimension parameter are numerically determined as functions of shell width. The calculation results reveal that the binding energy and mass shift of the polaron first increase and then decrease as the shell width increases. A maximum value appears at a certain shell width for different aluminum concentrations and a given core radius. By using the fractal dimension method, polaron problems in cylindrical GaAs/AlxGa1-xAs core-shell nanowires are solved in a simple manner that avoids complex and lengthy calculations.Polaron effects in cylindrical GaAs/AlxGa1-xAs core-shell nanowires are studied by applying the fractal dimension method. In this paper, the polaron properties of GaAs/AlxGa1-xAs core-shell nanowires with different core radii and aluminum concentrations are discussed. The polaron binding energy, polaron mass shift, and fractal dimension parameter are numerically determined as functions of shell width. The calculation results reveal that the binding energy and mass shift of the polaron first increase and then decrease as the shell width increases. A maximum value appears at a certain shell width for different aluminum concentrations and a given core radius. By using the fractal dimension method, polaron problems in cylindrical GaAs/AlxGa1-xAs core-shell nanowires are solved in a simple manner that avoids complex and lengthy calculations.

关 键 词：core-shell nanowire polaron effects fractal dimension method 

分 类 号：O471.3[理学—半导体物理] TN304.23[理学—物理]