Izvorni znanstveni članak
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
Sažetak
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.
Ključne riječi
Mott-Hubbard transition; high-Tc superconductivity
Hrčak ID:
301023
URI
Datum izdavanja:
3.10.1999.
Posjeta: 452 *