Highly nonlinear excitonic Zeeman spin splitting in composition-engineered artificial atoms

V. Jovanov; T. Eisfeller; S. Kapfinger; E.C. Clark; F. Klotz; M. Bichler; J.G. Keizer; P.M. Koenraad; M.S. Brandt; A.G. Abstreiter; J.J. Finley

doi:10.1103/PhysRevB.85.165433

Highly nonlinear excitonic Zeeman spin splitting in composition-engineered artificial atoms

V. Jovanov, T. Eisfeller, S. Kapfinger, E.C. Clark, F. Klotz, M. Bichler, J.G. Keizer, P.M. Koenraad, M.S. Brandt, A.G. Abstreiter, J.J. Finley

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Abstract

Non-linear Zeeman splitting of neutral excitons is observed in composition engineerd InxGa1-xAS self-assembled quantum dots and its microscopic origin is explained. Eight-band k . p simulations, performed using realistic dot parameters extracted from cross-sectional scanning tunneling microscopy, reveal that a quadratic contribution to the Zeeman energy originates from a spin dependent mixing of heavy and light hole orbital states in the dot. The dilute In-composition (x 0.35) and large lateral size (40 - 50 nm) of the quantum dots investigated is shown to strongly enhance the non-linear excitonic Zeeman gap, providing a blueprint to enhance such magnetic non-linearitics via growth engineering

Original language	English
Article number	165433
Pages (from-to)	165433-1/6
Journal	Physical Review B
Volume	85
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.85.165433
Publication status	Published - 2012

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title = "Highly nonlinear excitonic Zeeman spin splitting in composition-engineered artificial atoms",

abstract = "Non-linear Zeeman splitting of neutral excitons is observed in composition engineerd InxGa1-xAS self-assembled quantum dots and its microscopic origin is explained. Eight-band k . p simulations, performed using realistic dot parameters extracted from cross-sectional scanning tunneling microscopy, reveal that a quadratic contribution to the Zeeman energy originates from a spin dependent mixing of heavy and light hole orbital states in the dot. The dilute In-composition (x 0.35) and large lateral size (40 - 50 nm) of the quantum dots investigated is shown to strongly enhance the non-linear excitonic Zeeman gap, providing a blueprint to enhance such magnetic non-linearitics via growth engineering",

author = "V. Jovanov and T. Eisfeller and S. Kapfinger and E.C. Clark and F. Klotz and M. Bichler and J.G. Keizer and P.M. Koenraad and M.S. Brandt and A.G. Abstreiter and J.J. Finley",

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T1 - Highly nonlinear excitonic Zeeman spin splitting in composition-engineered artificial atoms

AU - Jovanov, V.

AU - Eisfeller, T.

AU - Kapfinger, S.

AU - Clark, E.C.

AU - Klotz, F.

AU - Bichler, M.

AU - Keizer, J.G.

AU - Koenraad, P.M.

AU - Brandt, M.S.

AU - Abstreiter, A.G.

AU - Finley, J.J.

PY - 2012

Y1 - 2012

N2 - Non-linear Zeeman splitting of neutral excitons is observed in composition engineerd InxGa1-xAS self-assembled quantum dots and its microscopic origin is explained. Eight-band k . p simulations, performed using realistic dot parameters extracted from cross-sectional scanning tunneling microscopy, reveal that a quadratic contribution to the Zeeman energy originates from a spin dependent mixing of heavy and light hole orbital states in the dot. The dilute In-composition (x 0.35) and large lateral size (40 - 50 nm) of the quantum dots investigated is shown to strongly enhance the non-linear excitonic Zeeman gap, providing a blueprint to enhance such magnetic non-linearitics via growth engineering

AB - Non-linear Zeeman splitting of neutral excitons is observed in composition engineerd InxGa1-xAS self-assembled quantum dots and its microscopic origin is explained. Eight-band k . p simulations, performed using realistic dot parameters extracted from cross-sectional scanning tunneling microscopy, reveal that a quadratic contribution to the Zeeman energy originates from a spin dependent mixing of heavy and light hole orbital states in the dot. The dilute In-composition (x 0.35) and large lateral size (40 - 50 nm) of the quantum dots investigated is shown to strongly enhance the non-linear excitonic Zeeman gap, providing a blueprint to enhance such magnetic non-linearitics via growth engineering

U2 - 10.1103/PhysRevB.85.165433

DO - 10.1103/PhysRevB.85.165433

M3 - Article

SN - 1098-0121

VL - 85

SP - 165433-1/6

JO - Physical Review B

JF - Physical Review B

IS - 16

M1 - 165433

ER -

Highly nonlinear excitonic Zeeman spin splitting in composition-engineered artificial atoms

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