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Article Dans Une Revue npj Quantum Information Année : 2018

Electrically driven electron spin resonance mediated by spin–valley–orbit coupling in a silicon quantum dot

Romain Maurand

Résumé

The ability to manipulate electron spins with voltage-dependent electric fields is key to the operation of quantum spintronics devices, such as spin-based semiconductor qubits. A natural approach to electrical spin control exploits the spin-orbit coupling (SOC) inherently present in all materials. So far, this approach could not be applied to electrons in silicon, due to their extremely weak SOC. Here we report an experimental realization of electrically driven electron-spin resonance in a silicon-on-insulator (SOI) nanowire quantum dot device. The underlying driving mechanism results from an interplay between SOC and the multi-valley structure of the silicon conduction band, which is enhanced in the investigated nanowire geometry. We present a simple model capturing the essential physics and use tight-binding simulations for a more quantitative analysis. We discuss the relevance of our findings to the development of compact and scalable electron-spin qubits in silicon.

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Dates et versions

hal-02005720 , version 1 (04-02-2019)

Identifiants

Citer

Andrea Corna, Leo Bourdet, Romain Maurand, Alessandro Crippa, Dharmraj Kotekar-Patil, et al.. Electrically driven electron spin resonance mediated by spin–valley–orbit coupling in a silicon quantum dot. npj Quantum Information, 2018, 4, pp.6. ⟨10.1038/s41534-018-0059-1⟩. ⟨hal-02005720⟩
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