Eur. Phys. J. B 31, 311-313 (2003)
https://doi.org/10.1140/epjb/e2003-00036-4

Quantum spherical XY model with orthorhombic anisotropy in two dimensions

Theoretical Physics Chair, Physical Faculty, Tavrida National University, Yaltinskaya st. 4, Simferopol, 95007, Crimea, Ukraine

Corresponding author: ^a frid@tnu.crimea.ua

Received: 26 August 2002
Revised: 24 October 2002
Published online: 14 February 2003

Abstract

The quantum spherical XY model with orthorhombic anisotropy is investigated. It is shown that in contradiction with the results of reference [9], the long-range magnetic order is stabilized in two dimensions. Both analytical and numerical results are presented. The incorrect results of the work [9] are explained to be the result of improper choice of quantization axis.