Spin nematic states in spin-1 antiferromagnets with easy-axis anisotropy
A. V. Sizanov*, A. V. Syromyatnikov*+
*Konstantinov Petersburg Nuclear Physics Institute, National Research Centre "Kurchatov Institute", 188300 Gatchina, Russia
+Department of Physics, St.-Petersburg State University, 198504 St.-Petersburg, Russia
Abstract
It is well known that spin nematic phases can appear in either frustrated magnets
or in those described by Hamiltonians with large exotic non-Heisenberg terms like
biquadratic exchange. We show in the present study that non-frustrated spin-1 1D, 2D,
and 3D antiferromagnets with single-ion easy-axis anisotropy can show nematic phases in
strong magnetic field. For 1D case we support our analytical results by numerical ones.