Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/4532
Title: | Long-wave fluctuations of the two-dimensional Heisenberg antiferromagnet | Authors: | Belinicher, Victor Providência, João da |
Keywords: | Antiferromagnet; Disorder; Fluctuations | Issue Date: | 2000 | Citation: | Physica B: Condensed Matter. 284-288:Part 2 (2000) 1579-1580 | Abstract: | We have reduced the Heisenberg model for the quantum antiferromagnet in the leading approximation over 1/s to the spin-rotator model which represents some sort of quantum lattice rotator model. We perform the long-wavelength reduction of this spin-rotator model. An intermediate scale [Lambda] was introduced and the short-wavelength antiferromagnetic spin fluctuations were integrated out. As a result, we obtained the continuum nonlinear sigma model with some additional contributions. We presented arguments showing that this model is renormalizable in the framework of 1/N perturbation theory. We separated out all ultraviolet divergencies and expressed all parameters of the theory in terms of the parameters of the primary Heisenberg model, in the one-loop approximation. | URI: | https://hdl.handle.net/10316/4532 | DOI: | 10.1016/S0921-4526(99)02832-X | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
file077777515fd343ae9e2d1ac1668c35ad.pdf | 72.62 kB | Adobe PDF | View/Open |
Page view(s) 50
515
checked on Oct 15, 2024
Download(s) 50
404
checked on Oct 15, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.