Original scientific paper

Quantum phase transition in a random-tiling model

Denis K. Sunko ; Department of Physics, Faculty of Science, University of Zagreb, Bijenčka cesta 32, HR-10000 Zagreb, Croatia

Abstract

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 CuO4 `molecules', simulating the copper-oxide planes of high-Tc 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.

Keywords

Mott-Hubbard transition; high-Tc superconductivity

Hrčak ID:

301023

URI

https://hrcak.srce.hr/301023

Publication date:

3.10.1999.

Article data in other languages: croatian

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