摘要
本文计及电子发射和吸收多个虚声子对板化子的影响,用改进了的线性组合算符法讨论了N端极性晶体中极化子的性质,计算了极化子的第一内激发态的能量、有效质量、平均声于数,给出了极化子基态和第一内激发态之间的激发能与电子-声子耦合常数的关系式,结果表明:对第一内激发态,极化子效应随维度的降低而显著增强.
In this paper,the properties of polarons in N-dimensional polar crystals are discussed by using an improved Linear-Combination-Operater method taking account of the influence that electrons emit and absort many virtual phonons.The polaron energies at the first interal excited states polaron masses and the average phonon numbers around the electrons are calculated.The analytic relations between excitation energies of polarons and electron-phonon coupling constant are also obtainted.It is shown from the results that the polaron effects dramatically increase with decreasing of dimensionality for the first interal excited states.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
1992年第3期388-394,共7页
Journal of Inner Mongolia University：Natural Science Edition
关键词
N维极化子
内激发态
N-dimensional polarons
interal excited states
electron-phonon interatction
