Optically probing the fine structure of a single Mn atom in an InAs quantum dot

Details Optically probing the fine structure of a single Mn atom in an InAs quantum dot Optically probing the fine structure of a single Mn atom in an InAs quantum dot

2007-10-29

arxiv.org/abs/0710.5389v1

Phys. Rev. Lett. 99, 247209 (2007)

Physics

Condensed Matter

Materials Science

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.99.247209

We report on the optical spectroscopy of a single InAs/GaAs quantum dot (QD) doped with a single Mn atom in a longitudinal magnetic field of a few Tesla. Our findings show that the Mn impurity is a neutral acceptor state A^0 whose effective spin J=1 is significantly perturbed by the QD potential and its associated strain field. The spin interaction with photo-carriers injected in the quantum dot is shown to be ferromagnetic for holes, with an effective coupling constant of a few hundreds of micro-eV, but vanishingly small for electrons.

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