Electrical Spin Driving by g -Matrix Modulation in Spin-Orbit Qubits

Alessandro Crippa; Romain Maurand; Leo Bourdet; Dharmraj Kotekar-Patil; Anthony Amisse; Xavier Jehl; M. Sanquer; Romain Lavieville; Heorhii Bohuslavskyi; Louis Hutin; Sylvain Barraud; Maud Vinet; Yann-Michel Niquet; Silvano de Franceschi

doi:10.1103/PhysRevLett.120.137702

Article dans une revue

Electrical Spin Driving by g -Matrix Modulation in Spin-Orbit Qubits

Alessandro Crippa ¹ Romain Maurand ¹ Leo Bourdet ² Dharmraj Kotekar-Patil ^{3, 1} Anthony Amisse ¹ Xavier Jehl ³ M. Sanquer ³ Romain Lavieville ⁴ Heorhii Bohuslavskyi ⁴ Louis Hutin ⁴ Sylvain Barraud ⁴ Maud Vinet ⁴ Yann-Michel Niquet ² Silvano de Franceschi ³

1 NPSC - Nanophysique et Semiconducteurs

PHELIQS - PHotonique, ELectronique et Ingénierie QuantiqueS : DRF/IRIG/PHELIQS

2 LSIM [?-2019] - Laboratory of Atomistic Simulation [?-2019]

MEM - Modélisation et Exploration des Matériaux : DRF/IRIG/MEM

3 LaTEQS - Laboratoire de Transport Electronique Quantique et Supraconductivité

PHELIQS - PHotonique, ELectronique et Ingénierie QuantiqueS : DRF/IRIG/PHELIQS

4 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

Abstract : In a semiconductor spin qubit with sizable spin-orbit coupling, coherent spin rotations can be driven by a resonant gate-voltage modulation. Recently, we have exploited this opportunity in the experimental demonstration of a hole spin qubit in a silicon device. Here we investigate the underlying physical mechanisms by measuring the full angular dependence of the Rabi frequency, as well as the gate-voltage dependence and anisotropy of the hole g factor. We show that a g-matrix formalism can simultaneously capture and discriminate the contributions of two mechanisms so far independently discussed in the literature: one associated with the modulation of the g factor, and measurable by Zeeman energy spectroscopy, the other not. Our approach has a general validity and can be applied to the analysis of other types of spin-orbit qubits.

Type de document :

Article dans une revue

Domaine :

Physique [physics] / Matière Condensée [cond-mat] / Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Liste complète des métadonnées

https://hal.univ-grenoble-alpes.fr/hal-02005672
Contributeur : Marc Sanquer <>
Soumis le : lundi 4 février 2019 - 11:20:05
Dernière modification le : mardi 1 septembre 2020 - 15:24:05