Coexistence of large and small mass polarons

被引：19
|
作者：
Iadonisi, G [1 ]
Cataudella, V
De Filippis, G
Ninno, D
机构：
[1] Univ Naples, Ist Nazl Fis Mat, I-80125 Naples, Italy
[2] Univ Naples, Dipartimento Sci Fisiche, I-80125 Naples, Italy
[3] Univ Salerno, Dipartimento Sci Fisiche, I-85100 Salerno, Italy
来源：
EUROPHYSICS LETTERS | 1998年 / 41卷 / 03期
关键词：
D O I：
10.1209/epl/i1998-00148-y
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The polaron self-energy and the effective mass are studied around the Gamma point of the Brillouin zone as a function of the bare electron band width Delta, the electron-phonon coupling constant alpha, and the density lambda of other electrons. It is found that there are ranges of values of Delta, alpha and lambda in which there is coexistence of polarons with small and large masses. The effect of such coexistence on the optical infrared absorbtion coefficient in polar materials is discussed.
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收藏
页码：309 / 314
页数：6
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