POLARON CONTRIBUTION TO THE INFRARED OPTICAL-RESPONSE OF LA2-XSRXCUO4+DELTA AND LA2-XSRXNIO4+DELTA

被引：176

作者：

BI, XX ^{[1
]}

EKLUND, PC ^{[1
]}

机构：

[1] UNIV KENTUCKY,CTR APPL ENERGY RES,LEXINGTON,KY 40506

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.70.2625

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The anomalous midinfrared absorption band in the optical conductivity of La2-xSrxCuO4+delta La2-xSrxNiO4+delta is interpreted in terms of photon-assisted hopping of small polarons. An analysis of the normal-state single crystal a-b plane data indicates that polarons in La2-xSrxNiO4+delta are small, whereas in La2-xSrxCuO4+delta the polarons are larger. The absence of bulk superconductivity in La2-xSrxNiO4+delta may be linked with smaller polaron size.

引用

页码：2625 / 2628

页数：4

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