Anisotropy and Suppression of Spin-Orbit Interaction in a GaAs Double Quantum Dot

Hofmann, A. and Maisi, V. F. and Krähenmann, T. and Reichl, C. and Wegscheider, W. and Ensslin, K. and Ihn, T.. (2017) Anisotropy and Suppression of Spin-Orbit Interaction in a GaAs Double Quantum Dot. Physical Review Letters, 119 (17). p. 176807.

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The spin-flip tunneling rates are measured in GaAs-based double quantum dots by time-resolved charge detection. Such processes occur in the Pauli spin blockade regime with two electrons occupying the double quantum dot. Ways are presented for tuning the spin-flip tunneling rate, which on the one hand gives access to measuring the Rashba and Dresselhaus spin-orbit coefficients. On the other hand, they make it possible to turn on and off the effect of spin-orbit interaction with a high on/off ratio. The tuning is accomplished by choosing the alignment of the tunneling direction with respect to the crystallographic axes, as well as by choosing the orientation of the external magnetic field with respect to the spin-orbit magnetic field. Spin lifetimes of 10 s are achieved at a tunneling rate close to 1 kHz.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Quantum Computing with Semiconductors (Hofmann)
UniBasel Contributors:Hofmann, Andrea
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:28 Jan 2022 14:57
Deposited On:28 Jan 2022 14:57

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