Observation of the symmetry of core states of a single Fe impurity in GaAs

J Bocquel; V. R Kortan; R. P Campion; B. L Gallagher; M. E Flatté; P. M Koenraad

doi:10.1103/PhysRevB.96.075207

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Observation of the symmetry of core states of a single Fe impurity in GaAs

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Observation of the symmetry of core states of a single Fe impurity in GaAs

J Bocquel, V. R Kortan, R. P Campion, B. L Gallagher, M. E Flatté and P. M Koenraad

Physical review. B, Vol.96(7), 075207

01/28/2015

DOI: 10.1103/PhysRevB.96.075207

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Abstract

Phys. Rev. B 96, 075207 (2017) We report the direct observation of two mid-gap core d-states of differing symmetry for a single Fe atom embedded in GaAs. These states are distinguished by the strength of their hybridization with the surrounding host electronic structure. The mid-gap state of Fe that does not hybridize via sigma-bonding is strongly localized to the Fe atom, whereas the other, which does, is extended and comparable in size to other acceptor states. Tight-binding calculations of these mid-gap states agree with the spatial structure of the measured wave functions, and illustrate that such measurements can determine the degree of hybridization via pi-bonding of impurity d-states. These single-dopant mid-gap states with strong d-character, which are intrinsically spin-orbit-entangled, provide an opportunity for probing and manipulating local magnetism and may be of use for high-speed electrical control of single spins.

Details

Title: Subtitle: Observation of the symmetry of core states of a single Fe impurity in GaAs
Creators: J Bocquel - Eindhoven University of Technology
V. R Kortan - University of Iowa
R. P Campion - University of Nottingham
B. L Gallagher - University of Nottingham
M. E Flatté - University of Iowa
P. M Koenraad - Eindhoven University of Technology
Resource Type: Journal article
Publication Details: Physical review. B, Vol.96(7), 075207
DOI: 10.1103/PhysRevB.96.075207
ISSN: 2469-9950
eISSN: 2469-9969
Grant note: DOI: 10.13039/100011102, name: Seventh Framework Programme, award: PF7/2007-2013; DOI: 10.13039/100000015, name: U.S. Department of Energy, award: DE-SC0016447; DOI: 10.13039/100000181, name: Air Force Office of Scientific Research
Language: English
Date published: 01/28/2015
Academic Unit: Electrical and Computer Engineering; Physics and Astronomy
Record Identifier: 9984199734902771

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