Quantum phase transition in a random-tiling model
强关联电子
2007-05-23 v1
摘要
The analogue of a Mott-Hubbard transition is discussed, which appears at an incommensurate filling in a model of a two-dimensional plane, randomly tiled with CuO_4 `molecules', simulating the copper-oxide planes of high-T_c superconductors. It is shown to be a quantum phase transition, which can be crossed either in doping, at a fixed hopping overlap t, or in t, when the doping is fixed in a certain range below half-filling. It is first-order, closely analogous to a liquid-gas transition.
引用
@article{arxiv.cond-mat/0005170,
title = {Quantum phase transition in a random-tiling model},
author = {D. K. Sunko},
journal= {arXiv preprint arXiv:cond-mat/0005170},
year = {2007}
}
备注
8 pages, 2 figures, appeared in a `festschrift' issue of Fizika A