Spin and valley T_1 times in graphene quantum dots
ORAL · Invited
Abstract
We measure spin T_1 times in graphene quantum dots containing one carrier of 10-50 ms using single shot read-out. Two and three electron states in graphene single- and double dots are investigated in magnetic fields parallel and perpendicular to the graphene plane. This way different configurations are found to display spin blockade, valley blockade or both. In the two carrier configuration we find valley T_1 times exceeding 500 ms.
This work was done in collaboration with C. Tong, R. Garreis, L. Gächter, W. Huang, J. Gerber, A. Kurzmann, and T. Ihn.
This work was done in collaboration with C. Tong, R. Garreis, L. Gächter, W. Huang, J. Gerber, A. Kurzmann, and T. Ihn.
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Publication: Lisa Maria Gächter, Rebekka Garreis, Chuyao Tong, Max Josef Ruckriegel, Benedikt Kratochwil, Folkert Kornelis de Vries, Annika Kurzmann, Kenji Watanabe, Takashi Taniguchi, Thomas Ihn, Klaus Ensslin, Wister Wei Huang<br>«Single-shot readout in graphene quantum dots»<br>PRX Quantum 3, 020343 (2022)<br>Chuyao Tong, Annika Kurzmann, Rebekka Garreis, Wei Wister Huang, Samuel Jele, Marius Eich, Lev Ginzburg, Christopher Mittag, Kenji Watanabe, Takashi Taniguchi, Klaus Ensslin, and Thomas Ihn<br>«Pauli Blockade of Tunable Two-Electron Spin and Valley States in Graphene Quantum Dots»<br>Phys. Rev. Lett. 128, 067702 (2022)
Presenters
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Klaus Ensslin
ETH Zurich
Authors
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Klaus Ensslin
ETH Zurich