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- Title
Stability of Surface State Electrons on Helium Films.
- Authors
Leiderer, P.; Scheer, E.; Kono, K.; Lin, J.-J.; Rees, D.
- Abstract
Electrons on helium substrates form a model Coulomb system in which the transition from classical electron liquid to Wigner crystal is readily observed. However, attempts to increase the electron density in order to observe the 'quantum melting' of the system to a Fermi degenerate gas are hindered by an instability of the helium surface. Here we describe experimental efforts to reach the degenerate regime on thin helium films and microstructured substrates, for which the surface instability is suppressed. We demonstrate that, although the electron densities obtained exceed those for bulk helium substrates, observation of quantum melting remains challenging. We discuss possible solutions to the technical challenges involved.
- Subjects
HELIUM at low temperatures; SURFACE stability; MONOMOLECULAR films; SURFACE states; ELECTRON gas; ELECTRON density
- Publication
Journal of Low Temperature Physics, 2016, Vol 183, Issue 3/4, p258
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-015-1377-8