Spatial structure of an individual Mn acceptor in GaAs
Yakunin, A. M. · Silov, A. Yu. · Koenraad, P. M. · Wolter, J. H. · Van Roy, W. · De Boeck, J. · Tang, J. -M. · Flatte, M. E.
Original · EN
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, cross-like 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 cross-like shape for the hole wave-function. Thus the coupling between Mn dopants in GaMnAs mediated by such holes will be highly anisotropic.
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