量子环中极化子的温度效应

Temperature dependence of polarom in quantum ring

采用求解能量本征方程和LLP幺正变换方法,研究了量子环中极化子的温度效应.数值计算表明:当温度较低时,温度对极化子的基态能量无影响,当温度较高时,极化子的基态能量随温度的升高而增大;还表明极化子的基态能量随电子—声子耦合强度的增大而减小,随电子受限程度的增强(即量子环内径增大或外径减小)而增大,说明其量子尺寸效应非常显著.

Temperature dependence of polaron in quantum ring was studied by solving the time-independent Schrodinger equation and using LLP unitery transimision method. The numerical calculation results showed that the ground state energy of polaron was const in lower temperature and increused with rising temperature in higher temperature. The numerical calculation results also showed that the ground state energy of polaron decreased with increasing coupling strength between electron and LO-phonon,and increased with increasing the confinement strength of quantum ring（increasing the inner radius or decreasing the outer radius of quantum ring）, which showed the quantum size effect in quantum ring was very obvious.