Active tuning of the g-tensor in InGaAs/GaAs quantum dots via strain

H. M. G. A. Tholen; J. S. Wildmann; A. Rastelli; R. Trotta; C. E. Pryor; E. Zallo; O. G. Schmidt; P. M. Koenraad; A. Yu Silov

doi:10.1103/PhysRevB.99.195305

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Active tuning of the g-tensor in InGaAs/GaAs quantum dots via strain

Journal article

Peer reviewed

Active tuning of the g-tensor in InGaAs/GaAs quantum dots via strain

H. M. G. A. Tholen, J. S. Wildmann, A. Rastelli, R. Trotta, C. E. Pryor, E. Zallo, O. G. Schmidt, P. M. Koenraad and A. Yu Silov

Physical review. B, Vol.99(19), p.195305

05/16/2019

DOI: 10.1103/PhysRevB.99.195305

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Abstract

Dynamic control over the full g-tensor in individual InGaAs/GaAs self-assembled quantum dots is achieved by inducing external strain via a piezoelectric actuator. The full g-tensor is obtained by measuring in different geometries with different angles between an externally applied magnetic field and the quantum dot growth axes. A large decrease in the out-of-plane hole g-factor with strain is observed, whereas the other components are found to be less sensitive. To further investigate this, a numerical model based on eight-band k.p-theory is used and an excellent agreement with the experimental results is established, both qualitatively and quantitatively. Furthermore, the calculations reveal the origin of the observed large change in the out-of-plane hole g-factor to be the increase in heavy-hole light-hole splitting under compressive stress.

Materials Science

Materials Science, Multidisciplinary

Physical Sciences

Physics

Physics, Applied

Physics, Condensed Matter

Science & Technology

Technology

Details

Title: Subtitle: Active tuning of the g-tensor in InGaAs/GaAs quantum dots via strain
Creators: H. M. G. A. Tholen - Eindhoven University of Technology
J. S. Wildmann - Johannes Kepler University of Linz
A. Rastelli - Johannes Kepler University of Linz
R. Trotta - Sapienza University of Rome
C. E. Pryor - University of Iowa
E. Zallo - Leibniz Institute for Solid State and Materials Research
O. G. Schmidt - Leibniz Institute for Solid State and Materials Research
P. M. Koenraad - Eindhoven University of Technology
A. Yu Silov - Eindhoven University of Technology
Resource Type: Journal article
Publication Details: Physical review. B, Vol.99(19), p.195305
DOI: 10.1103/PhysRevB.99.195305
ISSN: 2469-9950
eISSN: 2469-9969
Publisher: Amer Physical Soc
Number of pages: 8
Grant note: P29603 / Austrian Science Fund (FWF) 022.005.011 / Graduate Programme of the Netherlands Organisation for Scientific Research (NWO) European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme; European Research Council (ERC)
Language: English
Date published: 05/16/2019
Academic Unit: Physics and Astronomy
Record Identifier: 9984428835002771

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