Incommensurate structures studied by a modified Density Matrix Renormalization Group Method
Statistical Mechanics
2009-10-31 v1
Abstract
A modified density matrix renormalization group (DMRG) method is introduced and applied to classical two-dimensional models: the anisotropic triangular nearest- neighbor Ising (ATNNI) model and the anisotropic triangular next-nearest-neighbor Ising (ANNNI) model. Phase diagrams of both models have complex structures and exhibit incommensurate phases. It was found that the incommensurate phase completely separates the disordered phase from one of the commensurate phases, i. e. the non-existence of the Lifshitz point in phase diagrams of both models was confirmed.
Cite
@article{arxiv.cond-mat/9912131,
title = {Incommensurate structures studied by a modified Density Matrix Renormalization Group Method},
author = {Andrej Gendiar and Anton Surda},
journal= {arXiv preprint arXiv:cond-mat/9912131},
year = {2009}
}
Comments
14 pages, 14 figures included in text, LaTeX2e, submitted to PRB, presented at MECO'24 1999 (Wittenberg, Germany)