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Self-generated nonlinear oscillations in multilayer semiconductor heterostructures

Dottling, R and Rudzick, O and Scholl, E and Straw, A and Vickers, AJ and Balkan, N and Cunha, A Da (1994) Self-generated nonlinear oscillations in multilayer semiconductor heterostructures. In: UNSPECIFIED, ? - ?.

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Nonlinear charge transport parallel to the layers of modulation-doped GaAs/AlxGa1-xAs heterostructures is studied theoretically and experimentally. In the field regime of about 2 kV cm-1 we find DC-induced current oscillations associated with N-shaped negative differential resistance. We develop a dynamic model based on real space transfer of hot electrons from the undoped high-mobility GaAs layers to the adjacent n-doped low-mobility AlxGa1-xAs layers. In particular, we extend previous models to multilayer structures and investigate the dependence of the self-generated oscillations upon circuit conditions and the lattice temperature in the range TL=77-200 K. In the light of the experimental results the theoretical predictions are analysed and discussed.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Additional Information: Published proceedings: Semiconductor Science and Technology
Subjects: Q Science > QC Physics
Divisions: Faculty of Science and Health
Faculty of Science and Health > Computer Science and Electronic Engineering, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 12 Mar 2017 17:52
Last Modified: 06 Jan 2022 14:46

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