Scaling properties of antiferromagnetic transition in coupled spin ladder systems doped with nonmagnetic impurities

被引:43
作者
Imada, M
Iino, Y
机构
关键词
spin ladder; scaling theory; quantum critical point; nonmagnetic impurity; antiferromagnetic order;
D O I
10.1143/JPSJ.66.568
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study effects of interladder coupling on critical magnetic properties of spin ladder systems doped with small concentrations of nonmagnetic impurities, using the scaling theory together with quantum Monte Carlo (QMC) calculations. Scaling properties in a wide region in the parameter space of the impurity concentration x and the interladder coupling are governed by the quantum critical point (QCP) of the undoped system for the transition between antiferromagnetically ordered and spin-gapped phases. This multi-dimensional and strong-coupling region has characteristic power-law dependences on x for magnetic properties such as the Neel temperature. The relevance of this criticality for understanding experimental results of ladder compounds is stressed.
引用
收藏
页码:568 / 571
页数:4
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