TY - JOUR
T1 - Electrical Spin Driving by g-Matrix Modulation in Spin-Orbit Qubits
AU - Crippa, Alessandro
AU - Maurand, Romain
AU - Bourdet, Léo
AU - Kotekar-Patil, Dharmraj
AU - Amisse, Anthony
AU - Jehl, Xavier
AU - Sanquer, Marc
AU - Laviéville, Romain
AU - Bohuslavskyi, Heorhii
AU - Hutin, Louis
AU - Barraud, Sylvain
AU - Vinet, Maud
AU - Niquet, Yann-Michel
AU - Franceschi, Silvano De
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/3/30
Y1 - 2018/3/30
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85044715560&partnerID=8YFLogxK
U2 - 10.1103/physrevlett.120.137702
DO - 10.1103/physrevlett.120.137702
M3 - Article
SN - 0031-9007
VL - 120
JO - Physical Review Letters
JF - Physical Review Letters
M1 - 137702
ER -