Quantum Phase Transition in Pr2CuO4 to Collinear Spin State in Inclined Magnetic Field: A Neutron Diffraction Observation
Strongly Correlated Electrons
2009-11-07 v1
Abstract
In the external field slightly inclined to the - or y-axis of the frustrated tetragonal atiferromagnet Pr2CuO4, a transition is discovered from the phase with orthogonal antiferromagnetic spin subsystems along [1,0,0] and [0,1,0] to the phase with the collinear spins. This phase is shown to be due to the pseudodipolar interaction, and transforms into the spin-flop phase S perp H asymptotically at very high field. The discovered phase transition holds at T=0 and is a quantum one, with the transition field being the critical point and the angle between two subsystems being the order parameter.
Cite
@article{arxiv.cond-mat/0207197,
title = {Quantum Phase Transition in Pr2CuO4 to Collinear Spin State in Inclined Magnetic Field: A Neutron Diffraction Observation},
author = {V. P. Plakhty and S. V. Maleyev and S. V. Gavrilov and F. Bourdarot and S. Pouget and S. N. Barilo},
journal= {arXiv preprint arXiv:cond-mat/0207197},
year = {2009}
}