量子棒中磁极化子的回旋共振特性和光学声子平均数  

The Cyclotron Resonance Characteristics of Magnetopolaron and the Average Number of Optical Phonons in the Quantum Rods

作　　者：韩超[1] 李海峰 徐华伟[1] 额尔敦朝鲁[1] 

机构地区：[1]河北科技师范学院理化学院,河北秦皇岛066004 [2]秦皇岛市广播电视大学

出　　处：《河北科技师范学院学报》2011年第4期48-52,共5页Journal of Hebei Normal University of Science & Technology

基　　金：河北省自然科学基金项目(A2008000463)

摘　　要：基于Huybrechts线性组合算符法,采用Lee-Low-Pines幺正变换和变分技术研究了磁场中量子棒内抛物限制势下电子-体纵光学声子强耦合磁极化子基态的回旋共振特性,推导出磁极化子回旋共振频率和光学声子平均数与磁场的回旋频率、电子-声子耦合强度、量子棒的纵横比和受限强度的变化规律。数值结果表明:磁极化子的光学声子平均数和回旋共振频率随磁场的回旋频率、电子-声子耦合强度和量子棒的受限强度的增加而增大,随量子棒纵横比的增加而减小。Based on the method of the Huybrechts linear combination operator, the cyclotron resonance charac- teristics of electron-longitudinal optical phonons strongly-coupling magnetopolaron on the ground-state under parabolic confinement potential in the quantum rods within a magnetic field were studied, and the variation law of the cyclotron resonance frequency, the average optical phonon number of magnetopolaron change with cyclo- tron frequency of magnetic field, the electron-phonon coupling strength, aspect ratio of quantum rods and con- ~mement strength are derived by using the Lee-Low-Pines unitary transformation and various techniques. Nu- merical results show that the average number of optical phonon and cyclotron resonance frequency of magneto- polaron will increase with the growth of the cyclotron frequency of magnetic field, while the electron-phonon coupling strength and the confinement strength of quantum rods decrease with the increase of aspect ratio of quantum rods.

关 键 词：量子棒 磁极化子 回旋共振频率 光学声子数平均数 

分 类 号：O469[理学—凝聚态物理]