Fast nuclear spin hyperpolarization of phosphorus in silicon

Details Fast nuclear spin hyperpolarization of phosphorus in silicon Fast nuclear spin hyperpolarization of phosphorus in silicon

2008-06-20

arxiv.org/abs/0806.3429v1

Physical Review Letters 102, 027601 (2009)

Physics

Condensed Matter

Materials Science

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.102.027601

We experimentally demonstrate a method for obtaining nuclear spin hyperpolarization, that is, polarization significantly in excess of that expected for a thermal equilibrium. By exploiting a modified Overhauser process, we obtain more than 68% nuclear anti-polarization of phosphorus donors in silicon. This polarization is reached with a time constant of ~150 seconds, at a temperature of 1.37 K and a magnetic field of 8.5 T. The ability to obtain such large polarizations is discussed with regards to its significance for quantum information processing and magnetic resonance imaging.

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