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Harnessing nuclear spin polarization fluctuations in a semiconductor nanowire

Peddbhotla, P. and Xue, F. and Hauge, H. I. T. and Assali, S. and Bakkers, E. P. A. M. and Poggio, M.. (2013) Harnessing nuclear spin polarization fluctuations in a semiconductor nanowire. Nature Physics, 9. pp. 631-635.

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Official URL: http://edoc.unibas.ch/dok/A6174409

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Abstract

Soon after the first measurements of nuclear magnetic resonance in a condensed-matter system, Bloch1 predicted the presence of statistical fluctuations proportional to in the polarization of an ensemble of N spins. Such spin noise2 has recently emerged as a critical ingredient for nanometre-scale magnetic resonance imaging3,4,5,6. This prominence is a consequence of present magnetic resonance imaging resolutions having reached less than (100 nm)3, a size scale at which statistical spin fluctuations begin to dominate the polarization dynamics. Here, we demonstrate a technique that creates spin order in nanometre-scale ensembles of nuclear spins by harnessing these fluctuations to produce polarizations both larger and narrower than the thermal distribution. This method may provide a route to enhancing the weak magnetic signals produced by nanometre-scale volumes of nuclear spins or a way of initializing the nuclear hyperfine field of electron-spin qubits in the solid state.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanotechnologie Argovia (Poggio)
UniBasel Contributors:Poggio, Martino and Peddibhotla, Phani Kumar and Xue, Fei
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Nature Publishing Group
ISSN:1745-2473
e-ISSN:1745-2481
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:03 Aug 2018 13:35
Deposited On:25 Oct 2013 08:33

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