量子线中强耦合束缚磁极化子的电场效应

Electric field effect of strong-coupling bound megnetpolaron in quantum wires

采用线性组合算符和幺正变换相结合方法研究了电场和温度对抛物量子线中强耦合束缚磁极化子性质的影响。计算了在电场和温度影响下抛物量子线中强耦合束缚磁极化子的基态能量、平均声子数和振动频率.数值计算结果表明:量子线中强耦合束缚磁极化子的基态能量随约束强度、回旋共振频率和电场强度的增强而增大,随耦合强度的增大和温度的上升而减小;平均声子数随回旋共振频率、约束强度和温度的增大而增加;振动频率随回旋共振频率的增大而增大,同时也随约束强度的增大而增大.

The influences of electric field and temperature on properties of strong-coupling bound megnet- polaron in parabolic quantum wires were studied by using the linear combination operator and the unitary transformation methods. The relations of the ground state energy, mean number of megnetphonon and vibrational frequency in parabolic quantum wires with the confinement strength, cyclotron resonance fre- quency and electric field were calculated. The numerical results show that the ground state energy increases with the confinement strength, cyclotron resonance frequency and electric field, however, it decreases with increasing of temperature and the coupling strength. The mean number of phonon is an increasing function of the temperature and confinement strength and cyclotron resonance frequency. The variation frequency increases with increasing of the cyclotron resonance frequency and confinement strength.