ON THE OXYGEN ISOTOPE EFFECT AND APEX ANHARMONICITY IN HIGH-TC CUPRATES

被引:180
作者
MULLER, KA [1 ]
机构
[1] UNIV ZURICH, DEPT PHYS, CH-8001 ZURICH, SWITZERLAND
来源
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1990年 / 80卷 / 02期
关键词
D O I
10.1007/BF01357502
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Emphasis is put on a precise knowledge of the oxygen isotope shift exponent αO is the so far synthesized high-Tc superconductors in order to elucidate the basic mechanism. The known data, see αa in Table 6, indicate the presence of a presumably anharmonic coupling of pyramidal apex oxygen motion along the c-axis in these highly in-plane correlated superconductors. αa is computed from αO=rαa, based on the conjecture that the ratio r of apex to total oxygen-ion content per unit cell is relevant. The related experimental and theoretical literature is reviewed. © 1990 Springer-Verlag.
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页码:193 / 201
页数:9
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