Microscopic origin of dimerization in the CuO2 chains in Sr14CU24O41

被引：43

作者：

Hiroi, Z ^{[1
]}

Amelinckx, S ^{[1
]}

VanTendeloo, G ^{[1
]}

Kobayashi, N ^{[1
]}

机构：

[1] KYOTO UNIV,CHEM RES INST,UJI,KYOTO 611,JAPAN

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.54.15849

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The interplay between structure and magnetic properties of Sr14Cu24O41+delta with CuO2 chain and Cu2O3 ladder building blocks is studied as a function of oxygen nonstoichiometry. The characteristic decrease in the magnetic susceptibility below 80 K for delta approximate to 0 disappears both with increasing and decreasing delta, and, correspondingly, the periodicity of the superstructure, which arises from the lattice mismatch along the chain direction between the two structure blocks, shows a significant change. The microscopic origin of the singlet ground state is suggested to be the localization of electrons at low temperature in dimers on structurally modulated CuO2 chains.

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页码：15849 / 15855

页数：7

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