Journal article
Spatial structure of Mn-Mn acceptor pairs in GaAs
Physical review letters, Vol.95(25), 256402
12/13/2005
DOI: 10.1103/PhysRevLett.95.256402
PMID: 16384482
Abstract
The local density of states of Mn-Mn pairs in GaAs is mapped with
cross-sectional scanning tunneling microscopy and compared with theoretical
calculations based on envelope-function and tight-binding models. These
measurements and calculations show that the crosslike shape of the Mn-acceptor
wavefunction in GaAs persists even at very short Mn-Mn spatial separations. The
resilience of the Mn-acceptor wave-function to high doping levels suggests that
ferromagnetism in GaMnAs is strongly influenced by impurity-band formation. The
envelope-function and tight-binding models predict similarly anisotropic
overlaps of the Mn wave-functions for Mn-Mn pairs. This anisotropy implies
differing Curie temperatures for Mn $\delta$-doped layers grown on differently
oriented substrates.
Details
- Title: Subtitle
- Spatial structure of Mn-Mn acceptor pairs in GaAs
- Creators
- A. M Yakunin - Eindhoven University of TechnologyA. Yu Silov - Eindhoven University of TechnologyP. M Koenraad - Eindhoven University of TechnologyJ. -M Tang - University of IowaM. E Flatté - University of IowaW Van Roy - IMECJ De Boeck - IMECJ. H Wolter - Eindhoven University of Technology
- Resource Type
- Journal article
- Publication Details
- Physical review letters, Vol.95(25), 256402
- DOI
- 10.1103/PhysRevLett.95.256402
- PMID
- 16384482
- NLM abbreviation
- Phys Rev Lett
- ISSN
- 0031-9007
- eISSN
- 1079-7114
- Language
- English
- Date published
- 12/13/2005
- Academic Unit
- Electrical and Computer Engineering; Physics and Astronomy
- Record Identifier
- 9984428678702771
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