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Coulomb oscillations in double metal tunnel junctions

✍ Scribed by L.J. Geerligs; M. Matters; J.E. Mooij

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
152 KB
Volume
194-196
Category
Article
ISSN
0921-4526

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✦ Synopsis

The Coulomb blockade of electron tunneling through two tunnel junctions in series can be suppressed periodically by applying a gate voltage to the central island. The resulting conductance peaks ("Coulomb oscillations") have been studied in aluminum-oxide-aluminum tunnel junctions. For decreasing temperature the peaks narrow, in agreement with theoretical predictions for a continuous energy spectrum of the island. We observe an increase of the conductance in the tails of the peaks for lower resistance devices, well described by thermally enhanced inelastic electron co-tunneling.

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