Direct measurement of spin-flip rates of a self-assembled InAs double quantum dot in single-electron tunneling

verfasst von: Olfa Dani, Robert Hussein, Johannes C. Bayer, Klaus Pierz, Sigmund Kohler, Rolf J. Haug
Abstract: Spin flips are one of the limiting factors for spin-based information processing. We demonstrate a transport approach for determining the spin-flip rates of a self-assembled InAs double quantum dot occupied by a single electron. In such devices, different Landé factors lead to an inhomogeneous Zeeman splitting, so that the two spin channels can never be at resonance simultaneously, leading to a spin blockade at low temperatures. This blockade is analyzed in terms of spin flips for different temperatures and magnetic fields. Our results are in good agreement with a quantum master equation that combines the dot-lead couplings with ohmic dissipation stemming from spin-flip cotunneling.
Organisationseinheit(en): Institut für Festkörperphysik
QuantumFrontiers
Externe Organisation(en): Friedrich-Schiller-Universität Jena
Physikalisch-Technische Bundesanstalt (PTB)
Spanish National Research Council (CSIC)
Typ: Artikel
Journal: Physical Review B
Band: 109
Anzahl der Seiten: 6
ISSN: 2469-9950
Publikationsdatum: 15.03.2024
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie
Elektronische Version(en): https://doi.org/10.48550/arXiv.2310.11259 (Zugang: Offen)
https://doi.org/10.1103/PhysRevB.109.L121404 (Zugang: Geschlossen)

BibTeX

@article{fe10a54a5d8e4b39ae1ceca1eca6f543,
title = "Direct measurement of spin-flip rates of a self-assembled InAs double quantum dot in single-electron tunneling",
abstract = "Spin flips are one of the limiting factors for spin-based information processing. We demonstrate a transport approach for determining the spin-flip rates of a self-assembled InAs double quantum dot occupied by a single electron. In such devices, different Land{\'e} factors lead to an inhomogeneous Zeeman splitting, so that the two spin channels can never be at resonance simultaneously, leading to a spin blockade at low temperatures. This blockade is analyzed in terms of spin flips for different temperatures and magnetic fields. Our results are in good agreement with a quantum master equation that combines the dot-lead couplings with ohmic dissipation stemming from spin-flip cotunneling.",
author = "Olfa Dani and Robert Hussein and Bayer, {Johannes C.} and Klaus Pierz and Sigmund Kohler and Haug, {Rolf J.}",
note = "Funding Information: Acknowledgment. This work was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy – EXC 2123 QuantumFrontiers – 390837967, the State of Lower Saxony of Germany via the Hannover School for Nanotechnology, and by the Spanish Ministry of Science, Innovation, and Universities (Grant No. PID2020-117787GB-I00), and by the CSIC Research Platform on Quantum Technologies PTI-001. ",
year = "2024",
month = mar,
day = "15",
doi = "10.48550/arXiv.2310.11259",
language = "English",
volume = "109",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Institute of Physics",
number = "12",
}