SUPERCONDUCTIVITY AND HOLE SOURCE IN HG(BA2-XSRX)CUO4+DELTA

被引：30

作者：

SUBRAMANIAN, MA ^{[1
]}

WHANGBO, MH ^{[1
]}

机构：

[1] N CAROLINA STATE UNIV,DEPT CHEM,RALEIGH,NC 27695

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1994年 / 109卷 / 02期

关键词：

D O I：

10.1006/jssc.1994.1121

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Mercury cuprates Hg(Ba2-xSrx)CuO4+delta (x = 0.0-0.7) were synthesized, and their structure and superconductivity were characterized. Single phases of Hg(Ba2-xSrx)CuO4+delta can be obtained for x = 0.0-0.7; they crystallize in a tetragonal structure, and their a- and c-parameters decrease smoothly with increasing x. The superconducting transition temperature of Hg(Ba2-xSrx)CuO4+delta decreases with increasing x, and superconductivity vanishes for x greater-than-or-equal-to 0.5. These observations and tight-binding electronic band structure calculations suggest that the hole source of Hg(Ba2-xSrx) CuO4+delta is not the Hg 6s band but the interstitial oxygen atoms in the HgO(delta) sheet. (C) 1994 Academic Press, Inc.

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页码：410 / 412

页数：3

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