SEQUENCE AND SYMMETRY OF HOLE INJECTION IN YBA2CU3O6+X - INSITU AND EXSITU EXPERIMENTS ON POWDERS AND SINGLE-CRYSTALS USING X-RAY ABSORPTION-SPECTROSCOPY

被引：60

作者：

TOLENTINO, H

BAUDELET, F

FONTAINE, A

GOURIEUX, T

KRILL, G

HENRY, JY

ROSSATMIGNOD, J

机构：

[1] UNIV NANCY 1,PHYS SOLIDES LAB,F-54506 VANDOEUVRE NANCY,FRANCE

[2] CEN,DEPT RECH FONDAMENTALE,F-38041 GRENOBLE,FRANCE

[3] CONSELHO NACL PESQUISAS,LNLS,BR-13081 CAMPINAS,SP,BRAZIL

来源：

PHYSICA C | 1992年 / 192卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(92)90751-W

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Very accurate XAS in situ and ex situ measurements at the Cu K-edge on powders and single crystals of YBa2Cu3O6+x have been carried out using the time-resolved dispersive spectrometer at LURE-DCI. The whole range of oxygen content has been investigated and the x-dependence of the amount of Cu(I) has been evaluated at room and at high temperatures (from 400 to 750-degrees-C). Owing to the balance of charges, we derived the amount of the oxygen 2p holes. The sequence of injection was separated into steps, associated with three oxygen bands of distinct symmetries and with the well-known steps in the superconducting behavior.

引用

页码：115 / 130

页数：16

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