摘要
采用线性组合算符方法 ,导出了有限温度下磁极化子中的平均光学声子数 ,讨论了平均声子数与温度T。
The properties of the polaron in crystals influence the properties of crystals very remarkably. The properties of the polaron for polar crystals have been of considerable interest.The polaron problem has been studied by many theoretical and experimental method by many investigators.Huybrechts calculated the ground state energy of the polaron. By means of vibrational scheme,the ground state energy,the effective mass and the mean number of phonons of polaron are derived by Tokuda. We discussed magnetic field and temperature dependence of a magnetopolaon by using a Tokuda's method. The polaron features of the one dimensional Holstein model are investigated by Cataudella,Filippis and Iadonisi by improving a variational method introduced recently and based on a linear superposition of Bloch states that describe large and small polaron wave functions.The mean number of phonons are calculated and discussed.However,the research on the magnetic field and temperature dependence of the mean number of phonons in a magnetopolaron has not been studied so far.In this paper,the magnetic field and temperature dependence of the mean number of optical phonons for a magnetopolaron in polar crystals are investigated by using a linear combination operator method.The results show that for the weak coupling the mean number of optical phonons will increase with increasing temperature T vibrational frequency λ and magnetic field B and will increase with decreasing coordinate z ,whereas for the strong coupling will increase with increasing λ,z,B and T.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2002年第5期481-484,共4页
Chinese Journal of Luminescence
基金
内蒙古高等学校科学研究项目资助课题 (ZD0 10 5 5 )
