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- IBM (United States)US73 papers
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8 papers · 1 filter
Nuclear spin relaxation induced by a mechanical resonator
C. L. Degen, M. Poggio, H. J. Mamin +1
We report on measurements of the spin lifetime of nuclear spins strongly coupled to a micromechanical cantilever as used in magnetic resonance force microscopy. We find that the ro…
Crossover from Kondo assisted suppression to co-tunneling enhancement of tunneling magnetoresistance via ferromagnetic nanodots in MgO tunnel barriers
Hyunsoo Yang, See-Hun Yang, Stuart Parkin
Recently, it has been shown that magnetic tunnel junctions with thin MgO tunnel barriers exhibit extraordinarily high tunneling magnetoresistance (TMR) values at room temperature1,…
The role of spin noise in the detection of nanoscale ensembles of nuclear spins
C. L. Degen, M. Poggio, H. J. Mamin +1
When probing nuclear spins in materials on the nanometer scale, random fluctuations of the spin polarization will exceed the mean Boltzmann polarization for sample volumes below ab…
On the Satisfiability Threshold and Clustering of Solutions of Random 3-SAT Formulas
Elitza Maneva, Alistair Sinclair
We study the structure of satisfying assignments of a random 3-SAT formula. In particular, we show that a random formula of density 4.453 or higher almost surely has no non-trivial…
Tailoring Graphene with Metals on Top
B. Uchoa, C. -Y. Lin, A. H. Castro Neto
We study the effects of metallic doping on the electronic properties of graphene using density functional theory in the local density approximation in the presence of a local charg…
Nuclear magnetic resonance force microscopy with a microwire rf source
M. Poggio, C. L. Degen, C. T. Rettner +2
We use a 1.0-um-wide patterned Cu wire with an integrated nanomagnetic tip to measure the statistical nuclear polarization of 19F in CaF2 by magnetic resonance force microscopy (MR…