We study the effect of quantum fluctuations on the multiphase point of the Heisenberg model with first- and second-neighbor competing interactions and strong uniaxial spin anisotropy D. By studying the structure of perturbation theory we show that the multiphase degeneracy which exists for S = infinity (i.e., for the axial next-nearest-neighbor Ising model) is lifted and that the effect of quantum fluctuations is to stabilize a. sequence of phases of wavelength 4,6,8,... . This sequence is probably an infinite one. We also show that quantum fluctuations can mediate an infinite sequence of layering transitions through which an interface can unbind from a wall.
|Titolo:||LIFTING OF MULTIPHASE DEGENERACY BY QUANTUM FLUCTUATIONS|
|Autori:||HARRIS AB; MICHELETTI C; YEOMANS JM|
|Rivista:||PHYSICAL REVIEW. B, CONDENSED MATTER|
|Data di pubblicazione:||1995|
|Digital Object Identifier (DOI):||10.1103/PhysRevB.52.6684|
|Appare nelle tipologie:||1.1 Journal article|