Shunt quantum capacitance induced source switching in an electron Y-branch switch

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Shunt quantum capacitance induced source switching in an electron Y-branch switch

D. Hartmann, L. Worschech, S. Lang, and A. Forchel

Phys. Rev. B 75, 121302(R) – Published 8 March 2007

Abstract

Switching between two electron sources can be realized classically by two complementary operating gates. We have studied the switching between two branches serving as electron sources in a Y-branched nanojunction controlled by one gate. By sweeping the voltage at the in-plane gate we observed switching between the electron sources. The source switching deviates from the classical source and drain switching and is related to a shunt quantum capacitance.