For authors
Submission status

Archive (English)
      Volume 109
      Volume 108
      Volume 107
      Volume 106
      Volume 105
      Volume 104
      Volume 103
      Volume 102
      Volume 101
      Volume 100
      Volume 99
      Volume 98
      Volume 97
      Volume 96
      Volume 95
      Volume 94
      Volume 93
VOLUME 94 | ISSUE 8 | PAGE 710
Quantum magnets with large single-ion easy-plane anisotropy in magnetic field
A. V. Sizanov*, A. V. Syromyatnikov*†
*Petersburg Nuclear Physics Institute, Gatchina, 188300 St. Petersburg, Russia
Department of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia

We propose a theory describing low-temperature properties of magnets with integer spin and large single-ion easy-plane anisotropy D in magnetic field H directed parallel to the hard axis. Considering the exchange interaction between spins as a perturbation and using the bosonic spin representation proposed in our recent paper [1] we find thermal corrections to the elementary excitation spectrum, magnetization and specific heat in the vicinity of the quantum critical point (QCP) H=H_{c1}(0)\sim D in the first nonvanishing orders of the perturbation theory. An expression is found for the boundary of the paramagnetic phase Hc1(T) in the H-T-plane. The effective interaction between bosons is derived near the QCP. The proposed theory describes well experimental data obtained in  NiCl2- 4SC(NH2)2 (DTN).

Download PS file (GZipped, 159.1K)  |  Download PDF file (225.3K)

Список работ, цитирующих данную статью, см. здесь.

List of articles citing this article can be found here.