https://doi.org/10.1140/epjb/e2003-00106-7
Wigner lattice of ripplopolarons in a multielectron bubble in helium
1
TFVS, Universiteit Antwerpen, Universiteitsplein 1,
B2610 Antwerpen, Belgium
2
Lyman Laboratory of Physics, Harvard University,
Cambridge, Massachusetts 02138, USA
Corresponding author: a devreese@uia.ua.ac.be
Received:
20
February
2003
Published online:
11
April
2003
The properties of ripplonic polarons in a multielectron bubble in liquid helium are investigated on the basis of a path-integral variational method. We find that the two-dimensional electron gas can form deep dimples in the helium surface, or ripplopolarons, to solidify as a Wigner crystal. We derive the experimental conditions of temperature, pressure and number of electrons in the bubble for this phase to be realized. This predicted state is distinct from the usual Wigner lattice of electrons: it melts by dissociation of the ripplopolarons when the electrons shed their localizing dimple as the pressure on the multielectron bubble drops below a critical value.
PACS: 73.20.Qt – Electron solids / 73.20.-r – Electron states at surfaces and interfaces / 64.70.Dv – Solid-liquid transitions / 68.35.Ja – Surface and interface dynamics and vibrations / 47.55.Dz – Drops and bubbles
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
