Fig. 3: Initialization and coherent control of a 13C nuclear spin.
From: Single nuclear spin detection and control in a van der Waals material
a, Illustration of the pulse sequence (left) for nuclear spin initialization. We use a SWAP gate (right) to transfer the electron spin polarization to the 13C nuclear spin. b, ODMR signal after nuclear spin initialization. One of the two peaks (III-2 and III-4) dominates, yielding a nuclear spin polarization of 0.43 (top) and −0.33 (bottom), depending on the direction of initialization. c, Pulse sequence for nuclear spin coherent control. d, An example of nuclear spin Rabi oscillation, persisting for 40 μs without significant decay. The blue curve is the experimental data and the red curve is fitting. e, Nuclear spin Rabi frequency as a function of the square root of the RF power. f, Nuclear spin Rabi oscillations taken at different RF powers.
