Phys. Rev. Lett. 89, 286802 (2002) [4 pages]Quantum Electronic Transport through a Precessing SpinReceived 19 April 2002; published 30 December 2002 The conductance through a local nuclear spin precessing in a magnetic field is studied by using the equations-of-motion approach. The characteristics of the conductance is determined by the tunneling matrix and the position of equilibrium chemical potential. We find that the spin-flip coupling between the electrons on the spin site and the leads produces the conductance oscillation. When the spin is precessing in the magnetic field at Larmor frequency (ωL), the conductance develops the oscillation with the frequency of both ωL and 2ωL components, the relative spectrum weight of which can be tuned by the chemical potential and the spin-flip coupling. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.286802
DOI:
10.1103/PhysRevLett.89.286802
PACS:
73.63.–b, 73.40.Gk, 75.20.Hr
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