Quantum phase transition in a random-tiling model

Sunko, Denis K. (1999) Quantum phase transition in a random-tiling model. Fizika A, 8 (4). pp. 311-318. ISSN 1330-0008

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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.

Item Type: Article
Keywords: Mott-Hubbard transition, high-Tc superconductivity
Date: 1999
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Publisher: Hrvatsko fizikalno društvo
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 14 Apr 2014 17:45
Last Modified: 14 Apr 2014 17:45
URI: http://digre.pmf.unizg.hr/id/eprint/819

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