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内蒙古民族师范学院 通辽,028043
收稿日期:1991-01-15,
纸质出版日期:1992-05-30
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肖景林, 孙宝权. 多原子极性晶体中表面激子的性质[J]. 发光学报, 1992,13(2): 123-135
Xiao Jinglin, Sun Baoquan . PROPERTY OF SURFACE EXCITON IN POLYATOMIC POLAR CRYSTALS[J]. Chinese Journal of Luminescence, 1992,13(2): 123-135
本文研究多原子极性晶体中表面激子的性质.采用微扰法导出表面激子的有效哈密顿量.多支LO声子对表面激子的自陷能和有效势的影响是相互独立的.对于Wannier激子
电子、空穴间的相互作用的有效势仍是库仑型的
只是介电常数约化为 <img style="vertical-align: middle" alt="" order="0" src="http://www.rhhz.net/qikantupian/fgxb-19920207-123.gif" /> .多支LO声子的作用使激子的自陷能更低.并得到激子的自陷条件.
In the early 1970's
Ibach made the low energy electron diffracting experimentation on ZnO etc. semiconductor surface. Since then the surface polaron in the crystals have been of considerable interest. Many scholars have studied the surface polaron problem. The properties of the exciton in the surface layer of crystals influence the optical properties of the crystals very remarkably. X. X. Liang discussed the properties of weak-coupling surface exciton in polar crystals. Most polar crystals are diatomic. In these crystals there is only one mode of longitudinal optical (LO) phonon. The properties of crystals have bean studied by a great variety of techniques
in which discussions are limited only for the case of one LO phonon branch. However
a large number of polar crystals
with several atoms per unit cell
have more than one LO phonon.
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肖景林、顾世稍, 内蒙古大学学报, 17, 297(1986).
肖景林, 内蒙古大学学报, 21, 48(1980).
肖景林, "强辆合多原子极性晶体中的表面激子的性质”(待发表).
X, X. Liang and S. W. Gu, Solid State Commun, , 50, 505(1984).
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