Spatial Structure of an Individual Mn Acceptor in GaAs

A. M. Yakunin, A. Yu. Silov, P. M. Koenraad, J. H. Wolter, W. Van Roy, J. De Boeck, J.-M. Tang, and M. E. Flatté

Phys. Rev. Lett. 92, 216806 – Published 28 May 2004

Abstract

The wave function of a hole bound to an individual Mn acceptor in GaAs is spatially mapped by scanning tunneling microscopy at room temperature and an anisotropic, crosslike shape is observed. The spatial structure is compared with that from an envelope-function, effective mass model and from a tight-binding model. This demonstrates that anisotropy arising from the cubic symmetry of the GaAs crystal produces the crosslike shape for the hole wave function. Thus the coupling between Mn dopants in GaMnAs mediated by such holes will be highly anisotropic.

Received 27 January 2004

DOI:https://doi.org/10.1103/PhysRevLett.92.216806

Authors & Affiliations

A. M. Yakunin¹, A. Yu. Silov¹, P. M. Koenraad¹, J. H. Wolter¹, W. Van Roy², J. De Boeck², J.-M. Tang³, and M. E. Flatté³

¹COBRA Inter-University, Eindhoven University of Technology, P.O. Box 513, NL-5600MB Eindhoven, The Netherlands
²IMEC, Kapeldreef 75, B-3001 Leuven, Belgium
³Optical Science and Technology Center and Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242, USA

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Vol. 92, Iss. 21 — 28 May 2004

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