Cu-O平面量子阱结构中的大双极化子(英文)  

MAGNETOPOLARON EFFECT FOR Cu O PALNE OF QUANTUM WELL STRUCTURE

作　　者：任宇航[1] 陈庆虎[1] 余亚斌[1] 焦正宽[1] 

机构地区：[1]浙江大学物理系

出　　处：《低温物理学报》1999年第4期252-255,共4页Low Temperature Physical Letters

摘　　要：在铜氧化物超导体中，空穴在内的运动往往归结为量子阱中的极化子问题。我们首次推广和发展了适用于全耦合空间的非微扰理论方法，对ＣｕＯ平面内的磁极化子问题进行了深入地研究和讨论．通过数值计算，我们发现随着磁场的加强或有效量子阱尺度的减小，ＣｕＯ平面内极化子的束缚能显著增大．同时。Abstract The effect of magnetic field for arbitrary electron phonon coupling polarons and longitudinal optical phonon system of Cu O plane of quantum well structure is investigated, for the first time, by using Feynman Haken variational path integral theory. A simple expression for the Feynman energy in the presence of magnetic fields is obtained. In numerical calculations, we find the binding energy of polarons of Cu O plane is monotonically stronger with the enhancement of the magnetic field strength or the decreasing of the effective well width in the whole coupling regime. Moreover, the magnetopolaron effect is also found to be related to symmetry.

关 键 词：铜氧化物 超导体 量子阱 大双极化子 

分 类 号：TM262[一般工业技术—材料科学与工程] O511.1[电气工程—电工理论与新技术]