2004/02/01 by A. M. Yakunin, A. Yu. Silov, P. M. Koenraad +5 · 1 citation
Physics and Astronomy · #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.92.216806
published as Phys. Rev. Lett. 92, 216806 (2004) · 3 figures, submitted to PRL
arxiv created 2004/02/01 · arxiv updated 2009/12/01
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.