Field-induced disorder in a gapped spin system with non-magnetic impurities
arXiv:cond-mat/0403537 · doi:10.1103/PhysRevLett.93.217204
Abstract
We study S=1/2 dimers which are weakly coupled by three-dimensional antiferromagnetic interactions J'. It is commonly known that doping with non-magnetic impurities immediately induces a long-range Neel order. We show that application of an external magnetic field H may drive the system back to a disordered phase. We discuss the zero temperature phase diagram in the (H,J') plane and we propose suggestions for experiments.
4 Revtex pages, 2 figures