Print Email Facebook Twitter Nonlinear and dot-dependent Zeeman splitting in GaAs/AlGaAs quantum dot arrays Title Nonlinear and dot-dependent Zeeman splitting in GaAs/AlGaAs quantum dot arrays Author Michal, V.P. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Fujita, T. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Baart, T.A. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Danon, J. (Norwegian University of Science and Technology (NTNU)) Reichl, C (ETH Zürich) Wegscheider, W (ETH Zürich) Vandersypen, L.M.K. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Nazarov, Y.V. (TU Delft QN/Nazarov Group; Kavli institute of nanoscience Delft) Date 2018-01-05 Abstract We study the Zeeman splitting in lateral quantum dots that are defined in GaAs-AlGaAs heterostructures by means of split gates. We demonstrate a nonlinear dependence of the splitting on magnetic field and its substantial variations from dot to dot and from heterostructure to heterostructure. These phenomena are important in the context of information processing since the tunability and dot-dependence of the Zeeman splitting allow for a selective manipulation of spins. We show that spin-orbit effects related to the GaAs band structure quantitatively explain the observed magnitude of the nonlinear dependence of the Zeeman splitting. Furthermore, spin-orbit effects result in a dependence of the Zeeman splitting on predominantly the out-of-plane quantum dot confinement energy. We also show that the variations of the confinement energy due to charge disorder in the heterostructure may explain the dependence of Zeeman splitting on the dot position. This position may be varied by changing the gate voltages, which leads to an electrically tunable Zeeman splitting. To reference this document use: http://resolver.tudelft.nl/uuid:5a034232-fc1b-4937-8d5a-aea406ec24e4 DOI https://doi.org/10.1103/PhysRevB.97.035301 ISSN 2469-9950 Source Physical Review B, 97 (3) Part of collection Institutional Repository Document type journal article Rights © 2018 V.P. Michal, T. Fujita, T.A. Baart, J. Danon, C Reichl, W Wegscheider, L.M.K. Vandersypen, Y.V. Nazarov Files PDF PhysRevB.97.035301.pdf 1.79 MB Close viewer /islandora/object/uuid:5a034232-fc1b-4937-8d5a-aea406ec24e4/datastream/OBJ/view