Electrons on Helium Films

  • A. J. Dahm
Part of the NATO ASI Series book series (NSSB, volume 257)


The properties of two-dimensional electron fluids and crystals bound to a bulk helium surface have been studied extensively for the last decade1. These systems are limited to the classical regime due to theinstability of a highly charged surface to fluctuations. The maximum density on a bulk helium surface is 2.4×109 cm−2. At this density the melting temperature ∝ \( \sqrt{n} \) is ~ 1 K compared to a Fermi energy ∝ n ~ 50 mK. Here n is the electron areal density. The high melting temperature is a result of the large potential energy reduction for the Coulomb interaction in the lattice phase where small electron separations are excluded.


Image Charge Helium Surface Substrate Roughness Quantum Regime Smooth Substrate 
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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • A. J. Dahm
    • 1
  1. 1.Physics DepartmentCase Western Reserve UniversityClevelandUSA

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