OPTICAL-EXCITATION OF POLARONIC IMPURITIES IN LA2CUO4+Y

被引：88
作者：
FALCK, JP
LEVY, A
KASTNER, MA
BIRGENEAU, RJ
机构：
[1] Department of Physics, Massachusetts Institute of Technology, Cambridge
来源：
PHYSICAL REVIEW B | 1993年 / 48卷 / 06期
关键词：
D O I：
10.1103/PhysRevB.48.4043
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The temperature dependence of the infrared reflectivity of lightly oxygen-doped La2CuO4+y shows that spectral weight is transferred between free-carrier conductivity and a photoionization band of impurity-bound carriers. The large difference between the optical 0.13-eV and thermal 0.035-eV ionization energy indicates that the impurity states are stabilized by a lattice distortion. It is shown that the line shape as well as the temperature dependence is consistent with absorption from a polaronic impurity state.
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页码：4043 / 4046
页数：4
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