声学形变势表面极化子的温度效应

TEMPERATURE DEPENDENCE OF THE ACOUSTIC DEFORMATION POTENTIAL SURFACE POLARON

采用线性组合算符方法 ,研究与表面光学声子耦合强、与表面声学声子耦合弱的声学形变势表面极化子的温度效应 .对 KI晶体的数值计算结果表明 :振动频率、有效质量随温度的升高而减少 。

The temperature characteristic of the acoustic deformation potential surface polaron in polar crystal, which has a weak coupling with surface phonons and a strong coupling with surface optical phonons was studied by using linear combination operator method.Numerical calculation for KI crystal as an example, illustrated that the vibration frequency λ and effective mass m * 2 of the acoustic deformation potential surface polaron decrease with increasing temperature, but the induced potential V a i of the acoustic deformation potential surface polaron will increase with increasing temperature.