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Fock-Darwin-Like Quantum Dot States Formed by Charged Mn Interstitial Ions

O. Makarovsky, O. Thomas, A. G. Balanov, L. Eaves, A. Patanè, R. P. Campion, C. T. Foxon, E. E. Vdovin, D. K. Maude, G. Kiesslich, and R. J. Airey
Phys. Rev. Lett. 101, 226807 – Published 25 November 2008

Abstract

We report a method of creating electrostatically induced quantum dots by thermal diffusion of interstitial Mn ions out of a p-type (GaMn)As layer into the vicinity of a GaAs quantum well. This approach creates deep, approximately circular, and strongly confined dotlike potential minima in a large (200μm) mesa diode structure without need for advanced lithography or electrostatic gating. Magnetotunneling spectroscopy of an individual dot reveals the symmetry of its electronic eigenfunctions and a rich energy level spectrum of Fock-Darwin-like states with an orbital angular momentum component |lz| from 0 to 11.

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  • Received 8 July 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.226807

©2008 American Physical Society

Authors & Affiliations

O. Makarovsky1,*, O. Thomas1, A. G. Balanov1,2, L. Eaves1, A. Patanè1, R. P. Campion1, C. T. Foxon1, E. E. Vdovin1,3, D. K. Maude4, G. Kiesslich1,†, and R. J. Airey5

  • 1School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom
  • 2Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom
  • 3Institute of Microelectronic Technology RAS, Chernogolovka, 142432, Russia
  • 4Grenoble High Magnetic Field Laboratory, CNRS, F-38042 Grenoble, France
  • 5Department of Electronic & Electrical Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom

  • *Corresponding author. oleg.makarovsky@nottingham.ac.uk
  • Present address: Institut für Theoretische Physik, Technische Universität Berlin, D-10623 Berlin, Germany.

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Issue

Vol. 101, Iss. 22 — 28 November 2008

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