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arXiv · 2310.11259

Direct measurement of spin-flip rates in single-electron tunneling

Olfa Dani·Robert Hussein·Johannes C. Bayer·Klaus Pierz·Sigmund Kohler·Rolf J. Haug
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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.

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Olfa Dani, Robert Hussein, Johannes C. Bayer, Klaus Pierz, Sigmund Kohler, Rolf J. Haug. 2023-10-17. Direct measurement of spin-flip rates in single-electron tunneling. https://doi.org/10.1103/physrevb.109.l121404

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