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Gate-controlled rectifying barrier in a two-dimensional hole gas

R Sordan, A Miranda, J Osmond, D Colombo, D Chrastina, G Isella and H von Känel

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The current flowing in a homogeneous low-dimensional conductor is shown to be rectified by a gate-controlled asymmetric barrier resembling a Schottky barrier. The barrier shape is set by varying the potential along a nanofabricated nonequipotential gate which allows simple external control over the device function independent of material properties. A forward-to-reverse current ratio of more than 104 is obtained. The merits of diodes fabricated in this way with respect to conventional diodes are discussed.


PACS

73.30.+y Surface double layers, Schottky barriers, and work functions

85.30.Tv Field effect devices

73.21.Fg Quantum wells

73.40.Ei Rectification

Subjects

Electronics and devices

Semiconductors

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 33 (20 August 2008)

Received 9 March 2008, in final form 10 June 2008

Published 7 July 2008



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