Electronic states above a helium film suspended on a ring-shaped substrate

A. C. A. Ramos, A. Chaves, G. A. Farias, and F. M. Peeters

Phys. Rev. B 77, 045415 – Published 18 January 2008

Abstract

We derived a nonlinear differential equation that describes the profile of a suspended helium film over a ring-shaped substrate in the presence of a perpendicular external electric field. The profile of the helium film was calculated as a function of the bulk liquid helium level and for several values of the external radius of the ring. The one electron surface states were calculated in the presence of external electric and magnetic fields. The electron energy levels increase with electric field as well as with the height of bulk helium. Aharonov-Bohm oscillations were observed in this system under appropriate conditions.

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Received 7 August 2007

DOI:https://doi.org/10.1103/PhysRevB.77.045415

Authors & Affiliations

A. C. A. Ramos^*, A. Chaves^†, and G. A. Farias^‡

Departamento de Física, Centro de Ciências Exatas, Universidade Federal do Ceará, Campus do Pici, Caixa Postal 6030, 60455-760 Fortaleza, Ceará, Brazil

F. M. Peeters^§

Departament of Physics, University of Antwerp (CGB), Groenenborgerlaan 171, B-2020 Antwerp, Belgium

^*acaramos@fisica.ufc.br
^†andrey@fisica.ufc.br
^‡gil@fisica.ufc.br
^§francois.peeters@ua.ac.be

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Issue

Vol. 77, Iss. 4 — 15 January 2008

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