Nonlinear high-frequency hopping conduction in two-dimensional arrays of Ge-in-Si quantum dots: Acoustic methods

Using acoustic methods we have measured nonlinear AC conductance in 2D arrays of Ge-in-Si quantum dots. The combination of experimental results and modeling of AC conductance of a dense lattice of localized states leads us to the conclusion that the main mechanism of AC conduction in hopping systems...

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Bibliographic Details
Published in:arXiv.org 2012-03
Main Authors: Drichko, I L, Diakonov, A M, Malysh, V A, I Yu Smirnov, Koptev, E S, Nikiforov, A I, Stepina, N P, Galperin, Y M, Bergli, J
Format: Article
Language:English
Subjects:
Charge transfer
Frequency hopping
Germanium
Hopping conduction
Measurement methods
Quantum dots
Resistance
Silicon
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Summary:Using acoustic methods we have measured nonlinear AC conductance in 2D arrays of Ge-in-Si quantum dots. The combination of experimental results and modeling of AC conductance of a dense lattice of localized states leads us to the conclusion that the main mechanism of AC conduction in hopping systems with large localization length is due to the charge transfer within large clusters, while the main mechanism behind its non-Ohmic behavior is charge heating by absorbed power.
ISSN:2331-8422
DOI:10.48550/arxiv.1203.3285