Hole doping of the CuO2 chains in (La,Sr,Ca)(14)Cu24O41

被引：174

作者：

Carter, SA ^{[1
]}

Batlogg, B ^{[1
]}

Cava, RJ ^{[1
]}

Krajewski, JJ ^{[1
]}

Peck, WF ^{[1
]}

Rice, TM ^{[1
]}

机构：

[1] ETH ZURICH,CH-8093 ZURICH,SWITZERLAND

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.77.1378

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Substantial hole doping has been achieved in (La,Sr,Ca)(14)Cu24O41 compounds with CuO2 chain and Cu2O3 ladder building blocks. Holes enter the structural units with larger O/Cu ratios which are the CuO2 chains. The ladders remain undoped and magnetically inert due to a large spin gap. The moments in the undoped chains interact weakly, and every hole added creates a nonmagnetic CuO2 unit and decreases the resistivity. At the maximum hole concentration (similar to 0.6/CuO2) the residual moments form a singlet ground state possibly due to dimerization with an excitation gap of similar to 140 K to the triplet state.

引用

页码：1378 / 1381

页数：4

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