Measurement of statistical nuclear spin polarization in a nanoscale GaAs sample

Xue, F. and Weber, D. P. and Peddibhotla, P. and Poggio, M.. (2011) Measurement of statistical nuclear spin polarization in a nanoscale GaAs sample. Physical Review B (Condensed Matter), 84. p. 205328.

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Official URL: http://edoc.unibas.ch/dok/A6070507

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We measure the statistical polarization of quadrupolar nuclear spins in a submicrometer (0.6μm3) particle of GaAs using magnetic resonance force microscopy. The crystalline sample is cut out of a GaAs wafer and attached to a micromechanical cantilever force sensor using a focused ion beam technique. Nuclear magnetic resonance is demonstrated on ensembles containing less than 5×108 nuclear spins and occupying a volume of around (300nm)3 in GaAs with reduced volumes possible in future experiments. We discuss how the further reduction of this detection volume will bring the spin ensembles into a regime where random spin fluctuations, rather than Boltzmann polarization, dominate their dynamics. The detection of statistical polarization in GaAs therefore represents an important first step toward 3D magnetic resonance imaging of III-V structures on the nanometer scale.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanotechnologie Argovia (Poggio)
UniBasel Contributors:Poggio, Martino and Xue, Fei and Peddibhotla, Phani Kumar and Weber, Dennis Patrick
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physics
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:27 Jul 2018 14:43
Deposited On:01 Feb 2013 08:44

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