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High pressure as a tool to tune electronic coupling in self-assembled quantum dot nanostructures

Itskevich, I. E.; Rybchenko, S. I.; Andreev, A. D.; Cahill, J.; Tartakovskii, A. I.; Skolnick, M. S.; Hill, G.; Hopkinson, M.

Authors

A. D. Andreev

J. Cahill

A. I. Tartakovskii

M. S. Skolnick

G. Hill

M. Hopkinson



Abstract

High pressure provides an efficient way of controlling the electronic properties of semiconductor nanostructures. We use pressure to tune electronic coupling in stacks of self-assembled quantum dots (SAQDs). The coupling occurs as soon as the distance and the height of the barriers between the dots are sufficiently small to permit interaction between the wavefunctions of electrons in adjacent dots. We demonstrate experimental evidence that application of pressure reduces and may quench the coupling. This happens because, under pressure, the inter-dot barriers become higher and hence less transparent for electron wavefunctions. The effect was revealed by means of photoluminescence spectroscopy and confirmed by theoretical modelling.

Journal Article Type Article
Publication Date Nov 1, 2004
Journal PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Print ISSN 0370-1972
Electronic ISSN 1521-3951
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 241
Issue 14
Pages 3257-3262
APA6 Citation Itskevich, I. E., Rybchenko, S. I., Andreev, A. D., Cahill, J., Tartakovskii, A. I., Skolnick, M. S., …Hopkinson, M. (2004). High pressure as a tool to tune electronic coupling in self-assembled quantum dot nanostructures. physica status solidi (b), 241(14), 3257-3262. doi:10.1002/pssb.200405235
DOI https://doi.org/10.1002/pssb.200405235
Keywords Electronic, Optical and Magnetic Materials; Condensed Matter Physics
Publisher URL https://onlinelibrary.wiley.com/doi/abs/10.1002/pssb.200405235