Dynamical properties and Wigner transitions of two-dimensional electron lattices on dielectric substrates

Lenac, Z. and Šunjić, Marijan (1991) Dynamical properties and Wigner transitions of two-dimensional electron lattices on dielectric substrates. Physical Review B, 44 (20). pp. 11465-11471. ISSN 1098-0121

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Abstract

The dynamical properties (phonon spectrum, sound velocities, vibrational energy) and phase transitions of a two-dimensional Wigner lattice are discussed in a model that takes into account the perpendicular delocalization of electron wave functions. The lattice floats above the dielectric substrate (He,Ar), with the dielectric constant determining the image force on the lattice. Those two effects, the perpendicular electron delocalization and the dielectric image force, which are obviously correlated, were usually neglected in the previous discussions of the Wigner-lattice dynamics. Here we show their influence on the electron-electron interaction and consequently on the dynamical properties of the Wigner lattice. We also suggest an experimental situation where those effects in the phase diagram could be eventually studied and detected.

Item Type: Article
Date: November 1991
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (1991) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 26 Aug 2014 16:08
Last Modified: 26 Aug 2014 16:08
URI: http://digre.pmf.unizg.hr/id/eprint/1464

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