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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Phase-space visualization of a metal–insulator transition

Christian Aulbach1, André Wobst1, Gert-Ludwig Ingold1, Peter Hänggi1 and Imre Varga2

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The Aubry–André model with its transition from a delocalized to a localized phase in one dimension is particularly well suited for a phase-space study of such a metal–insulator transition. The dependence of the Husimi function on the potential strength is discussed and described quantitatively by means of marginal distributions and the inverse participation ratio in phase space. The phase-space representation not only helps to visualize the metal–insulator transition but also sheds light on the question why such a transition is possible in a one-dimensional system. Differences and similarities between the Aubry–André model and the Anderson model in one and higher dimensions, respectively, will be pointed out.


PACS

05.70.Ce Thermodynamic functions and equations of state

71.30.+h Metal-insulator transitions and other electronic transitions

Subjects

Condensed matter: electrical, magnetic and optical

Statistical physics and nonlinear systems

Dates

Issue 1 (July 2004)

Received 12 May 2004

Published 5 July 2004



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