Fig. 2: Spin relaxation and resonance spectrum of the 1P–2P molecule’s five-electron state.
From: Coherent control of a donor-molecule electron spin qubit in silicon
a Spin relaxation rate measurement of the five-electron state, as a function of magnetic field. Error bars indicate 95% confidence intervals. The known T1 time of a single electron bound to a single P donor is shown in grey. b Energy level diagrams for each stage of the pulse sequence used in the spin control experiments, showing the potentials of the Zeeman states relative to the SET Fermi energy. c Example readout trace of the SET current as a function of time, for a representative four stage pulse sequence incorporating an ESR control pulse. d Electron spin resonance spectrum of the five-electron state of the 1P–2P molecule at B0 = 1.45 T. The fitted peak width is 7 MHz. The inset displays a narrower range of frequency settings and marks the two frequencies fmw,off, fmw,on used in the coherent driving experiments.
