Print Email Facebook Twitter Anisotropic Pauli spin blockade in hole quantum dots Title Anisotropic Pauli spin blockade in hole quantum dots Author Brauns, Matthias (University of Twente) Ridderbos, Joost (University of Twente) Li, Ang (Eindhoven University of Technology) Bakkers, E.P.A.M. (TU Delft QN/Bakkers Lab; Eindhoven University of Technology) Van Der Wiel, Wilfred G. (University of Twente) Zwanenburg, Floris A. (University of Twente) Date 2016 Abstract We present measurements on gate-defined double quantum dots in Ge-Si core-shell nanowires, which we tune to a regime with visible shell filling in both dots. We observe a Pauli spin blockade and can assign the measured leakage current at low magnetic fields to spin-flip cotunneling, for which we measure a strong anisotropy related to an anisotropic g factor. At higher magnetic fields we see signatures for leakage current caused by spin-orbit coupling between (1,1) singlet and (2,0) triplet states. Taking into account these anisotropic spin-flip mechanisms, we can choose the magnetic field direction with the longest spin lifetime for improved spin-orbit qubits. To reference this document use: http://resolver.tudelft.nl/uuid:d3e3e671-4349-43ab-896d-2b1d9ff9f10f DOI https://doi.org/10.1103/PhysRevB.94.041411 ISSN 2469-9950 Source Physical Review B, 94 (4) Part of collection Institutional Repository Document type journal article Rights © 2016 Matthias Brauns, Joost Ridderbos, Ang Li, E.P.A.M. Bakkers, Wilfred G. Van Der Wiel, Floris A. Zwanenburg Files PDF PhysRevB.94.041411.pdf 1.59 MB Close viewer /islandora/object/uuid:d3e3e671-4349-43ab-896d-2b1d9ff9f10f/datastream/OBJ/view