1992•Applied Physics LettersRequires access

Hole space-charge buildup and evidence for sequential tunneling in p-type double-barrier resonant tunneling devices

R. K. Hayden, L. Eaves, M. Henini, D. K. Maude, J. C. Portal, G. Hill

Abstract

Magnetoquantum oscillations in the tunnel current of a p-type double-barrier AlAs/GaAs/AlAs device are used to measure the buildup of hole space charge in the quantum well over a wide range of bias. These measurements demonstrate sequential tunneling of holes. The effective mass for hole tunneling is estimated.

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Key concepts: Quantum tunnelling, Tunnel effect, Effective mass (spring–mass system), Condensed matter physics, Rectangular potential barrier, Quantum well, Space charge, Physics