STRONTIUM-INDUCED OXYGEN DEFECT STRUCTURE AND HOLE DOPING IN LA2-XSRXCUO4

被引：57

作者：

TAN, ZQ

FILIPKOWSKI, ME

BUDNICK, JI

HELLER, EK

BREWE, DL

CHAMBERLAND, BL

BOULDIN, CE

WOICIK, JC

SHI, D

机构：

[1] NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899

[2] ARGONNE NATL LAB,ARGONNE,IL 60439

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.64.2715

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have discovered that the apical oxygen with a 2.35- La-O bond length is removed when La is substituted by Sr in polycrystalline La2-xSrxCuO4 under normal preparation conditions. This apical oxygen can be partially filled by oxygen annealing. It is reasoned that a defect oxygen is trapped at an interstitial site near the Sr atom. We present evidence that this defect oxygen is intrinsic to Sr doping, independent of processing conditions. We propose that this defect oxygen serves as a mechanism for hole doping similar to that in the superconducting oxygen-rich La2CuO4+y. © 1990 The American Physical Society.

引用

页码：2715 / 2718

页数：4

共 27 条

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