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Recent publications

Controlling spin relaxation with a cavity A Bienfait et al. Nature 531 74 (2016)

Nuclear spin decoherence of neutral 31P donors in silicon: Effect of 29Si nuclei ES Petersen et al. Phys Rev B 93 161202(R) (2016)

A silicon-based surface code quantum computer J O'Gorman et al. NPJ Quantum Info 2 15019 (2016)

29Si nuclear spins as a resource for donor spin qubits in silicon G Wolfowicz et al. New J Phys 18 023021 (2016)

Reaching the quantum limit of sensitivity in electron spin resonance A Bienfait et al. Nature Nanotechnology 11 253 (2015)

Charge dynamics and spin blockade in a hybrid double quantum dot in silicon M Urdampilleta et al. Phys Rev X 5 031024 (2015)

Spin relaxation and donor-acceptor recombination of Se+ in 28-silicon R Lo Nardo et al. Phys Rev B 92 165201 (2015)

Coherent storage of microwave excitations in rare-earth nuclear spins G Wolfowicz et al. Phys Rev Lett 114 170503 (2015)

Hybrid optical-electrical detection of donor electron spins with bound excitons in Si CC Lo et al. Nature Materials 14 490 (2015)

Conditional Control of Donor Nuclear Spins in Silicon Using Stark Shifts G Wolfowicz et al. Phys Rev Lett 113 157601 (2014)

>> complete list

Spin relaxation


Environmental effects on electron spin relaxation in N@C60 

envirrelax.png

We have studied the environmental effects of surrounding nuclear spins on the electron spin relaxation of the N@C60 molecule (which consists of a nitrogen atom at the center of a fullerene cage). Using dilute solutions of N@C60 in regular and deuterated toluene, we observe and model the effect of translational diffusion of nuclear spins of the solvent molecules on the N@C60 electron spin relaxation times. We also study spin relaxation in frozen solutions of N@C60 in CS2, to which small quantities of a glassing agent, S2Cl2, are added. At low temperatures, spin relaxation is caused by spectral diffusion of surrounding nuclear 35,37Cl spins in the S2Cl2, but, nevertheless, at 20 K, T2 as long as 0.23 ms is observed.

Environmental effects on electron spin relaxation in N@C60

John J. L. Morton, Alexei M. Tyryshkin, Arzhang Ardavan, Kyriakos Porfyrakis, S. A. Lyon and G. Andrew D. Briggs
Physical Review B 76 085418 (2007) Link


The effects of a pyrrolidine functional group on N@C60 

pyrol.png

Relaxation in unmodified N@C60 has been found to depend on vibrational modes of the N@C60 molecule itself, however if the fullerene is modified by a functional group in such a way as to introduce a zero-field-splitting (ZFS), the fluctuation of this ZFS due to molecular tumbling in liquid solution provides an additional relaxation pathway. Using pulsed EPR we observed this additional relaxation and use it to obtain estimates of the magntidue of the ZFS, and the molecular tumbling correlation time.

The effects of a pyrrolidine functional group on the magnetic properties of N@C60

Jinying Zhang, John J. L. Morton, Mark R. Sambrook, Kyriakos Porfyrakis, Arzhang Ardavan and G. Andrew D. Briggs
Chemical Physics Letters 432 523 (2006) Link


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