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Investigation of electron wave function hybridization in Ga0.25In0.75As/InP arrays

Appl. Phys. Lett. 95, 182105 (2009); doi:10.1063/1.3258495

Published 5 November 2009

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T. P. Martin,1,2 M. S. Fairbanks,1 B. C. Scannell,1 C. A. Marlow,1 H. Linke,1,3 and R. P. Taylor1,4
1Department of Physics, University of Oregon, Eugene, Oregon 97403, USA
2School of Physics, University of New South Wales, Sydney 2052, Australia
3Division of Solid State Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden
4Department of Physics and Astronomy, University of Canterbury, Christchurch 8140, New Zealand
We present a measurement technique for quantifying coupling between semiconductor quantum dots in an array. This technique employs magnetoconductance fluctuations to probe the decrease in the average spacing of the quantum energy levels as the electron wave functions in the dots undergo hybridization. Focusing on Ga0.25In0.75As dots, we investigate hybridization as the coupling strength is varied and the number of dots in the array is increased. Our technique reveals a significant drop in the average energy level spacing for multiple dot arrays, which is strong evidence for wave function hybridization. ©2009 American Institute of Physics
History: Received 14 September 2009; accepted 14 October 2009; published 5 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/182105/1
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KEYWORDS and PACS

Keywords
PACS
  • 73.21.La
    Quantum dots (electron states/collective excitations)
  • 73.63.Kv
    Quantum dots (electronic transport)
  • 72.20.My
    Galvanomagnetic and other magnetotransport effects (semiconductors/insulators)
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (17)
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