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Published September 15, 1991 | public
Journal Article Open

Probing a two-dimensional Fermi surface by tunneling

Abstract

Equilibrium tunneling between parallel two-dimensional electron systems is measured as a function of in-plane magnetic field and sheet density. For equal two-dimensional densities the tunnel conductance is sharply peaked around zero field, but varies slowly at intermediate fields. Around 6 T the conductance exhibits a weaker peak followed by an abrupt drop to zero. A simple model of two displaced, but intersecting, Fermi circles explains these results.

Additional Information

©1991 The American Physical Society Received 11 April 1991 We thank G. S. Boebinger and A. H. MacDonald for useful discussions.

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