Metal-Insulator Transition Accompanied with a Charge Ordering in the One-dimensional t-J' Model
Abstract
We study the metal-insulator transition accompanied with a charge ordering in the one-dimensional (1D) t-J' model at quarter filling by the density matrix renormalization group method. In this model the nearest-neighbor hopping energy t competes with the next-nearest-neighbor exchange energy J'. We have found that a metal-insulator transition occurs at a finite value of t/J'; (t/J')_C = 0.18 and the transition is of first order. In the insulating phase for small t/J', there is an alternating charge ordering and the system behaves as a 1D quantum Heisenberg antiferromagnet. The metallic side belongs to the universality class of the Tomonaga-Luttinger liquids. The quantum phase transition is an example of melting of the 1D quantum Heisenberg antiferromagnet.
Keywords
Cite
@article{arxiv.cond-mat/9801205,
title = {Metal-Insulator Transition Accompanied with a Charge Ordering in the One-dimensional t-J' Model},
author = {Tetsuya Mutou and Naokazu Shibata and Kazuo Ueda},
journal= {arXiv preprint arXiv:cond-mat/9801205},
year = {2009}
}
Comments
4 pages, 6 Postscript figures, REVTeX, submitted to Phys. Rev. B