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

Authors
BI XX EKLUND PC
Citation
Xx. Bi et Pc. Eklund, POLARON CONTRIBUTION TO THE INFRARED OPTICAL-RESPONSE OF LA2-XSRXCUO4-XSRXNIO4+DELTA(DELTA AND LA2), Physical review letters, 70(17), 1993, pp. 2625-2628
Citations number
37
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
70
Issue
17
Year of publication
1993
Pages
2625 - 2628
Database
ISI
SICI code
0031-9007(1993)70:17<2625:PCTTIO>2.0.ZU;2-E
Abstract
The anomalous midinfrared absorption band in the optical conductivity of La2-xSrxCuO4+delta La2-xSrxNiO4+delta is interpreted in terms of ph oton-assisted hopping of small polarons. An analysis of the normal-sta te single crystal a-b plane data indicates that polarons in La2-xSrxNi O4+delta are small, whereas in La2-xSrxCuO4+delta the polarons are lar ger. The absence of bulk superconductivity in La2-xSrxNiO4+delta may b e linked with smaller polaron size.