抛物受限势对非对称半指数量子阱中极化子基态结合能的影响  

The Influence of Parabolic Confinement Potential on Ground State Binding Energy of Polaron in Asymmetrical Semi-exponential Quantum Well

作　　者：孙丙西 肖景林[1] SUN Bing-xi;XIAO Jing-lin(Institute of Condensed Matter Physics,Inner Mongolia University for Nationalities,Tongliao 028043,China)

机构地区：[1]内蒙古民族大学凝聚态物理研究所,内蒙古通辽028043

出　　处：《内蒙古民族大学学报（自然科学版）》2020年第5期373-376,共4页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：国家自然科学基金项目(11464033);内蒙古自治区高校科学研究项目(NJZY13324)。

摘　　要：根据线性组合算符和两次幺正变换方法研究了非对称抛物受限势对非对称半指数量子阱中弱耦合极化子的基态结合能性质的影响.导出了GaAs非对称半指数量子阱中弱耦合极化子的基态结合能随x和y方向的非对称抛物受限势的的受限强度ωx和ωy和非对称半指数受限势的两个正参数U0和σ的依赖关系.研究结果表明非对称半指数量子阱的极化子的基态结合能是非对称抛物受限势的的受限强度ωx和ωy和非对称半指数受限势的正参数U0的增函数,而它是另一个正参数σ的减函数.Based on the linear combination operator and two unitary transformations the effect of the asymmetric parabolic constrained potential on the ground state binding energy properties of the weak-coupling polaron in a GaAs asymmetrical semi-exponential quantum well was investigated.The relation of the ground state binding en⁃ergy of the weak-coupling polaron in a GaAs asymmetrical semi-exponential quantum well varying with the con⁃finement strengths of the asymmetrical parabolic potential ωx and ωy of the x-and y-directions and the both positive parameters U0 and σ of asymmetric semi-exponential constrained potential was derived.The results in⁃dicate that it is an increasing function of the constrained strength ωx and ωy of the asymmetric parabolic con⁃strained potential and the positive parameters U0 of the asymmetric semi-exponential constrained potential and that it is another decreasing function of the positive parameterσ.

关 键 词：非对称半指数量子阱 非对称抛物受限势 极化子 线性组合算符 基态结合能 

分 类 号：O469[理学—凝聚态物理]