Wigner lattice of ripplopolarons in a multielectron bubble in helium

Details Wigner lattice of ripplopolarons in a multielectron bubble in helium Wigner lattice of ripplopolarons in a multielectron bubble in helium

2003-04-17

arxiv.org/abs/cond-mat/0304393v1

European Physical Journal B 32, 329 (2003)

Physics

Condensed Matter

19 pages, 4 figures

Scientific paper

10.1140/epjb/e2003-00106-7

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, in that it melts by the dissociation of the ripplopolarons, when the electrons shed their localizing dimple as the pressure on the multielectron bubble drops below a critical value.

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