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.
@article{arxiv.2310.11259,
title = {Direct measurement of spin-flip rates in single-electron tunneling},
author = {Olfa Dani and Robert Hussein and Johannes C. Bayer and Klaus Pierz and Sigmund Kohler and Rolf J. Haug},
journal= {arXiv preprint arXiv:2310.11259},
year = {2024}
}