%0 Journal Article
%T Excitons and effects of phonons on excitons in asymmetric square quantum well<br>非对称方势阱中的激子及其与声子的相互作用
%A Deng Yan-Ping
%A Lü Bin-Bin
%A Tian Qiang
%A <br>邓艳平
%A 吕彬彬
%A 田强
%J 物理学报
%D 2010
%I 
%X By LLP(Lee-Low-Pines)-like transformation and fractional-dimension variational treatment, the ground-state energies of excitons confined in Ga1-xAl<em>xAs/GaAs/Ga0.7Al0.3As asymmetric square quantum well and the influence of phonons are demonstrated. The exciton ground-state energy has a minimum value with the increasing well width. And we make clear the effects of the barrier height on the fractional dimension, exciton ground energy and binding energy. After taking into account of the interaction of exciton with LO-phonons, the values of the exciton ground-state energies increase remarkablely. Moreover, the exciton binding energy increases as the asymmetric well-width decreases or the barrier height increases.
%K asymmetric square quantum well
%K exciton
%K phonons
%K ground-state energy<br>非对称方势阱
%K 激子
%K 声子
%K 基态能量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=D343CA48AF0A1BD54F4C3A27ED8CA28C&yid=140ECF96957D60B2&vid=6AC2A205FBB0EF23&iid=DF92D298D3FF1E6E&sid=0D2CFF3D48251F44&eid=74DD9116852EC488&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=36