Multiband Tight-Binding Model of Local Magnetism in Ga1-xMnxAs

2003/05/31 by Jian-Ming Tang, Jian‐Ming Tang, Michael E. Flatté +1 · 1 citation
Materials Science · Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #ZnO doping and properties #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevlett.92.047201

published as Phys. Rev. Lett. 92, 047201 (2004) · 5 pages, 4 figures

openalex publication_date 2004/01/01 · arxiv created 2004/01/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present the spin and orbitally resolved local density of states (LDOS) for a single Mn impurity and for two nearby Mn impurities in GaAs. The GaAs host is described by a sp(3) tight-binding Hamiltonian, and the Mn impurity is described by a local p-d hybridization and on-site potential. Local spin-polarized resonances within the valence bands significantly enhance the LDOS near the band edge. For two nearby parallel Mn moments the acceptor states hybridize and split in energy. Thus scanning tunneling spectroscopy can directly measure the Mn-Mn interaction as a function of distance.

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