OPTICAL LINESHAPES OF IMPURITIES IN CRYSTALS - A LATTICE MODEL OF INHOMOGENEOUS BROADENING BY POINT-DEFECTS

被引：50

作者：

ORTH, DL ^{[1
]}

MASHL, RJ ^{[1
]}

SKINNER, JL ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT CHEM,MADISON,WI 53706

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1993年 / 5卷 / 16期

关键词：

D O I：

10.1088/0953-8984/5/16/011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Previous theories of inhomogeneous broadening by point defects of impurity transitions in crystals have invoked a continuum approximation for the defect positions. We generalize these theories by treating the crystal as a discrete lattice. At low defect densities we recover the results of the continuum theory, finding a Lorentzian lineshape. At high defect densities the lineshape is approximately Gaussian. At intermediate densities, the lineshape displays satellite structure due to different configurations of nearby defects. For all densities we derive approximate analytic expressions for the lineshape that are in good agreement with exact numerical results.

引用

页码：2533 / 2544

页数：12

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