磁场和温度对有限深抛物量子阱中极化子性质的影响  

Effects of Magnetic Field and Temperature on Polaron Properties in a Finite-depth Parabolic Quantum Well

作　　者：红兰[1] 双山 戈君 HONG Lan;SHUANG Shan;GE Jun(College of Mathematics and Physics,Hulunbuir University,Hulun Buir,Neimenggu,021008,CHN)

机构地区：[1]呼伦贝尔学院数理学院,内蒙古呼伦贝尔021008

出　　处：《固体电子学研究与进展》2024年第6期598-602,共5页Research & Progress of SSE

基　　金：呼伦贝尔市科技计划项目(SF2022006);内蒙古自治区高校科研项目(NJZY22274);内蒙古自治区高校科研项目(NJZY22291);呼伦贝尔学院校级科研项目(2022ZKYB09)。

摘　　要：运用线性组合算符法和变分技术并结合LLP第二次幺正变换和量子统计理论,研究磁场和温度影响下有限深抛物量子阱中极化子的性质,分别得到极化子基态能量和基态结合能与温度、磁场回旋共振频率、阱宽、电子-声子耦合强度之间的函数关系式。数值计算得到极化子基态能量是磁场回旋共振频率和温度的增函数,是电子-声子耦合强度和阱宽的减函数。极化子基态结合能随着温度、电子-声子耦合强度、阱宽的增加而增大,随着磁场回旋共振频率的增加而减小。量子限制效应与阱宽有关,阱宽越小量子限制效应越显著。The properties of polaron in a finite-depth parabolic quantum well under the influence of magnetic field and temperature were studied by using linear combination operator method and variational technique combined with LLP second unitary transformation and quantum statistics theory.The ground state energy and ground state binding energy of polaron were obtained as function of temperature,magnetic field cyclotron resonance frequency,well width and electron-phonon coupling strength,respectively.The ground state energy of polaron was calculated as an increasing function of the magnetic field cyclotron resonance frequency and temperature,and a decreasing function of the electron-phonon coupling strength and well width.The ground state binding energy of polaron increases with the increase of temperature,electron-phonon coupling strength and well width,but decreases with the increase of magnetic field cyclotron resonance frequency.The quantum confinement effect is related to the well width,and the smaller the well width is,the more significant the quantum confinement effect is.

关 键 词：有限深抛物量子阱 温度 磁场 

分 类 号：O431[机械工程—光学工程]