Impurity induced interactions in diluted La2CuO4
Journal
Physica C: Superconductivity and its Applications
Journal Volume
470
Journal Issue
SUPPL.1
Pages
S113-S114
Date Issued
2010
Author(s)
Liu, C.-W.
Abstract
A non-magnetic impurity, such as Zn, doped into a non-frustrated antiferromagnet can induce substantial frustrating interactions among the spins surrounding it and result in an enhanced suppression of the antiferromagnetic order. In addition, the strength of the intra-plane exchange couplings surrounding impurities is reduced by the lattice distortions. Using quantum Monte Carlo, we calculate the initial suppression rate of the staggered magnetization in a two-dimensional diluted Heisenberg antiferromagnet with both frustrating interaction and lattice distortion induced by the impurity. We find that the lattice distortion alone cannot explain the experimental results, while the dominant effect of enhanced order suppression is due to the frustrating interaction. © 2009 Elsevier B.V. All rights reserved.
Type
conference paper