Phys. Rev. Lett. 92, 216806 (2004) [4 pages]Spatial Structure of an Individual Mn Acceptor in GaAsReceived 27 January 2004; published 28 May 2004 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.216806
DOI:
10.1103/PhysRevLett.92.216806
PACS:
73.20.–r, 71.55.Eq, 75.50.Pp
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