摘要
根据Pekar类型变分法在电子与声子强耦合的条件下计算了抛物量子点中强耦合极化子的基态能量。讨论了电子-声子耦合强度,量子点受限长度对基态能量的影响,同时引进温度参数并讨论了其对基态能量的影响,结果得出在低温的条件下,耦合强度和受限长度对基态的能量影响起主要作用;在高温的条件下,温度对基态的能量影响起主要作用,而耦合强度与受限长度的影响很小。
On the condition of electron-LO-phonon strong coupling in a parabolic quantum dot, we obtained the ground-state energy of polaron by using Pekar type variation method. The relations between the ground energy and the electron-LO-phonon coupling strength, the confinement length , the temperature were discussed. The results indicate that the ground energy of polaron in a parabolic quantum dot will decrease with increasing the electron-LO-phonon coupling strength and the confinement length and increase with increasing the temperature.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2007年第5期647-650,共4页
Chinese Journal of Luminescence
基金
国家自然科学基金(10347004)~~
关键词
量子点
极化子
强耦合
quantum dot（QD）
polaron
strong-coupling
