INHOMOGENEITY OF CHARGE-CARRIER CONCENTRATION ALONG THE GRAIN-BOUNDARY PLANE IN OXIDE SUPERCONDUCTORS

被引：17

作者：

DRAVID, VP ^{[1
]}

ZHANG, H ^{[1
]}

WANG, YY ^{[1
]}

机构：

[1] NORTHWESTERN UNIV,SCI & TECHNOL CTR SUPERCONDUCT,EVANSTON,IL 60208

来源：

PHYSICA C | 1993年 / 213卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0921-4534(93)90452-V

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Spatially resolved transmission high energy electron loss spectrometry (EELS) has been utilized to probe the spatial variation of the hole concentration along the grain boundary (GB) plane in YBa2Cu3O7-delta (Y123). The O K pre-edge peak in the EELS spectra, which offers a quantitative measure of the hole concentration in p-type doped cuprate superconductors including Y123, has been observed to vary along the GB plane. These observations conform to the Dayem-Bridge-type model for GBs in Y123. A modified Dayem-Bridge model is presented based on the experimental observations of varying oxygen stoichiometry along the GB plane.

引用

页码：353 / 358

页数：6

共 16 条

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