电场和温度对三角势量子点中极化子基态性质的影响  

Influences of Electric Field and Temperature on the Ground-state Properties of Polaron in a Triangular Potential Quantum Dot

作　　者：李志新 张星 杨名超 LI Zhixin;ZHANG Xing;YANG Mingchao(Department of Physics, Hebei Normal University of Science and Technology, Qinhuangdao Hebei,066004, China)

机构地区：[1]河北科技师范学院物理系,河北秦皇岛066004

出　　处：《河北科技师范学院学报》2021年第3期1-5,共5页Journal of Hebei Normal University of Science & Technology

摘　　要：为深入研究电场和温度对三角势量子点中极化子基态性质的影响,在外加电场的情况下,通过利用Pekar类型的变分方法,研究了三角势量子点中强耦合极化子基态能量的温度依赖性。得到了极化子基态能量与三角势量子点受限长度、外加电场强度、三角势极角和温度参量的依赖关系,并进行了数值模拟计算。结果表明:极化子基态能量随着量子点受限长度、电场强度和温度参数的增加而减小,随着三角势极角的增加呈现周期性的变化。A variational method of Pekar type is adopted to study the effects of electric field and temperature dependence on the ground-state properties of polaron in triangular potential quantum dot(QD)under an applied electric field.The dependence relations among the ground-state energy of polaron and the confinement length of QD,the applied electric field strength,the angle parameter of triangular potential and the temperature parameter have been obtained,respectively.Numerical calculation is performed and the results show that the ground-state energy of polaron decrease with the increase of the confinement length of QD,the applied electric field strength and the temperature parameter,and changes periodically with the increase of the polar angle of triangular potential.

关 键 词：三角势量子点 强耦合极化子 基态能量 电场和温度 

分 类 号：O469[理学—凝聚态物理]