Spatial structure of an individual Mn acceptor in GaAs

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, 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.

3 figures, submitted to PRL

References in corpus (3)

• Multiband tight-binding model of local magnetism in GaMnAs
• Effective Hamiltonian for Ga_{1-x}Mn_xAs in the Dilute Limit
• Imaging of the [Mn2+(3d5) + hole] complex in GaAs by Cross-sectional Scanning Tunneling Microscopy

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