Small and large polarons in nickelates, manganites, and cuprates

被引：0
|
作者：
P. Calvani
P. Dore
S. Lupi
A. Paolone
P. Maselli
P. Giura
B. Ruzicka
S. -W. Cheong
W. Sadowski
机构：
[1] Università di Roma “La Sapienza”,INFM, Dipartimento di Fisica
[2] Daresbury Laboratories,Bell Laboratories
[3] Lucent Technologies,Faculty of Applied Physics and Mathematics
[4] Technical University of Gdansk,undefined
来源：
Journal of Superconductivity | 1997年 / 10卷
关键词：
Polarons; nickelates; manganites; cuprates;
D O I：
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中图分类号：
学科分类号：
摘要：
By comparing the optical conductivities of La1.67Sr0.33NiO4 (LSNO), Sr1.5La0.5MnO4 (SLMO), Nd2CuO4-y (NCO), and Nd1.96Ce0.04CuO4 (NCCO), we have identified a peculiar behavior of polarons in this cuprate family. Whereas in LSNO and SLMO small polarons localize into ordered structures below a transition temperature, in these cuprates the polarons appear to be large, and at lowT their binding energy decreases. This reflects an increase of the polaron radius, which may trigger coherent transport.
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页码：293 / 297
页数：4
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