A germanium hole spin qubit

Watzinger, Hannes and Kukučka, Josip and Vukušić, Lada and Gao, Fei and Wang, Ting and Schäffler, Friedrich and Zhang, Jian-Jun and Katsaros, Georgios (2018) A germanium hole spin qubit. Nature Communications, 9 (3902). ISSN 2041-1723

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Holes confined in quantum dots have gained considerable interest in the past few years due to their potential as spin qubits. Here we demonstrate two-axis control of a spin 3/2 qubit in natural Ge. The qubit is formed in a hut wire double quantum dot device. The Pauli spin blockade principle allowed us to demonstrate electric dipole spin resonance by applying a radio frequency electric field to one of the electrodes defining the double quantum dot. Coherent hole spin oscillations with Rabi frequencies reaching 140 MHz are demonstrated and dephasing times of 130 ns are measured. The reported results emphasize the potential of Ge as a platform for fast and electrically tunable hole spin qubit devices.

Item Type: Article
DOI: 10.1038/s41467-018-06418-4
Subjects: 500 Science > 530 Physics
Research Group: Katsaros Group
Depositing User: Hannes Watzinger
Date Deposited: 07 Feb 2019 09:19
Last Modified: 07 Feb 2019 09:19
URI: https://repository.ist.ac.at/id/eprint/1073

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