Two-dimensional Wigner crystal on helium films: an indication of quantum melting

Using molecular dynamics simulation (MD) we have investigated the melting of the two-dimensional Wigner crystal on 240Å-500Å liquid helium films supported by substrates of dielectric constants epsilons = 2.2-7.3. Our results show good agreement with available theoretical and experimental results for...

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Bibliographic Details
Published in:Brazilian journal of physics 2006-09, Vol.36 (3a), p.682-684
Main Authors: Cunha, J. A. R. da, Cândido, Ladir
Format: Article
Language:English
Subjects:
PHYSICS, MULTIDISCIPLINARY
Online Access:Get full text
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Summary:Using molecular dynamics simulation (MD) we have investigated the melting of the two-dimensional Wigner crystal on 240Å-500Å liquid helium films supported by substrates of dielectric constants epsilons = 2.2-7.3. Our results show good agreement with available theoretical and experimental results for densities below 1.0×10(10)cm-2. For higher densities, we notice some disagreements suggesting that quantum effects are important in this regime of densities.
ISSN:0103-9733
1678-4448
DOI:10.1590/S0103-97332006000500019