Non-magnetic impurities in two- and three- dimensional Heisenberg antiferromagnets

Abstract

In this paper we study in a large-S expansion effects of substituting spins by non-magnetic impurities in two- and three- dimensional Heisenberg antiferromagnets in a weak magnetic field. In particular, we demonstrate a novel mechanism where magnetic moments are induced around non-magnetic impurities when magnetic field is present. As a result, Curie-type behaviour in magnetic susceptibility can be observed well below the Neel temperature, in agreement with what is being observed in $L{a}_{2}C{u}_{1-x}Z{n}_x{O}_4$ and $Sr(C{u}_{1-x}Z{n}_x{)}_2{O}_3$ compounds.

arXiv commentLatex file

References in corpus (1)

• Vortices in Schwinger-Boson Mean-Field Theory of Two-Dimensional Quantum Antiferromagnets

Cited by in corpus (4)

• Experiments on Ladders Reveal a Complex Interplay between a Spin-Gapped Normal State and Superconductivity
• Susceptibilities of Sr(Cu_(1-x)Zn_x)_2O_3 Studied by Quantum Monte Carlo Simulation
• Synthesis, Structural and magnetic properties of the solid solution (CuCl1-xBrx)LaNb2O7 (0<x<1)
• Models of impurities in valence bond spin chains and ladders