Stroppa, A. (2006) Structural, electronic and magnetic properties of Mn-doped GaAs(110) surface. Il nuovo cimento C, 29 (3). pp. 315-324. ISSN 1826-9885
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Abstract
First principles total-energy pseudopotential calculations have been performed to investigate STM images of the (110) cross-sectional surface of Mndoped GaAs. We have considered configurations with Mn in interstitial positions in the uppermost surface layer with Mn surrounded by As (IntAs) or Ga (IntGa) atoms. The introduction of Mn on the GaAs(110) surface results in a strong local distortion in the underlying crystal lattice, with variations of interatomic distances up to 3% with respect to unrelaxed ones. In both cases, the surface electronic structure is half-metallic (or nearly half metallic) and it strongly depends on the local Mn environment. The nearby Mn atoms show an induced spin-polarization resulting in a ferromagnetic Mn–As and antiferromagnetic Mn–Ga configuration. The simulation of the STM images show very different pattern of the imaged Mn atom, suggesting that they could be easily discerned by STM analysis.
| Item Type: | Article |
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| Uncontrolled Keywords: | Surface states, band structure, electron density of states ; Magnetic semiconductors ; Surface magnetism ; III-V semiconductors |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 19 Mar 2020 14:10 |
| Last Modified: | 19 Mar 2020 14:10 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/16078 |
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