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Bistability and dynamic depopulation in transport through a system of weakly coupled quantum wires

A. Messica, U. Meirav, Hadas Shtrikman, V. Umansky, and D. Mahalu
Phys. Rev. B 54, R5247(R) – Published 15 August 1996
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Abstract

We study conductance through a system of weakly coupled narrow wires formed in the plane of a GaAs/AlxGa1xAs heterojunction, where a voltage Vds is applied perpendicular to the wires, in the plane. We find an abrupt onset of current as Vds is increased beyond a certain critical value. In contrast, when Vds is swept down there is a gradual decrease in current which extends well below the critical Vds. The abrupt onset and the hysteresis are interpreted in terms of a bistability of the system, where the conducting state is associated with dynamic depopulation of the wires. Additional features in the conductance are also observed and discussed.

  • Received 16 April 1996

DOI:https://doi.org/10.1103/PhysRevB.54.R5247

©1996 American Physical Society

Authors & Affiliations

A. Messica, U. Meirav, Hadas Shtrikman, V. Umansky, and D. Mahalu

  • Braun Center for Submicron Research, Weizmann Institute of Science, Rehovot 76100, Israel

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Vol. 54, Iss. 8 — 15 August 1996

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