Polarization of Nuclear Spins from the Conductance of Quantum Wire

Details Polarization of Nuclear Spins from the Conductance of Quantum Wire Polarization of Nuclear Spins from the Conductance of Quantum Wire

2004-03-17

arxiv.org/abs/cond-mat/0403448v2

Phys. Rev. Lett. 93, Article 126601, 4 pages (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.93.126601

We devise an approach to measure the polarization of nuclear spins via conductance measurements. Specifically, we study the combined effect of external magnetic field, nuclear spin polarization, and Rashba spin-orbit interaction on the conductance of a quantum wire. Nonequilibrium nuclear spin polarization affects the electron energy spectrum making it time-dependent. Changes in the extremal points of the spectrum result in time-dependence of the conductance. The conductance oscillation pattern can be used to obtain information about the amplitude of the nuclear spin polarization and extract the characteristic time scales of the nuclear spin subsystem.

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