PLANAR OXYGEN-CENTERED LATTICE INSTABILITIES IN TL-BASED HIGH-TEMPERATURE SUPERCONDUCTORS

被引：20

作者：

DELEON, JM ^{[1
]}

LI, GG ^{[1
]}

CONRADSON, SD ^{[1
]}

BISHOP, AR ^{[1
]}

SUBRAMANIAN, MA ^{[1
]}

RAISTRICK, ID ^{[1
]}

机构：

[1] DUPONT CO INC, DEPT CENT RES & DEV, EXPTL STN, WILMINGTON, DE 19880 USA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1994年 / 220卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(94)90927-X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Analysis of the copper K-edge X-ray absorption fine structure on Tl2Ba2CuO6, Tl2Ba2CaCu2O8, and Tl2Ba1.2Sr0.8CuO6 indicates that the copper-equatorial oxygen local structure changes in the vicinity of the superconducting transition. These data also show that the radial distribution function for these bonds is complex with several oxygen positions relative to the copper, indicating that the local structure of the CuO2 planes differs significantly from the average crystal structure. These results suggest the presence of polarons in these planes, whose structure changes across the superconducting transition, and are thus coupled to the hole pairing states.

引用

页码：377 / 382

页数：6

共 31 条

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