Small and large polarons in nickelates, manganites, and cuprates

被引：12

作者：

Calvani, P

Dore, P

Lupi, S

Paolone, A

Maselli, P

Giura, P

Ruzicka, B

Cheong, SW

Sadowski, W

机构：

[1] SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND

[2] AT&T BELL LABS,LUCENT TECHNOL,MURRAY HILL,NJ 07974

[3] GDANSK TECH UNIV,FAC APPL PHYS & MATH,PL-80592 GDANSK,POLAND

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1997年 / 10卷 / 04期

关键词：

polarons; nickelates; manganites; cuprates;

D O I：

10.1007/BF02765706

中图分类号：

O59 [应用物理学];

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 low T their binding energy decreases. This reflects an increase of the polaron radius, which may trigger coherent transport.

引用

页码：293 / 297

页数：5

共 22 条

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