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Measurements of strongly-anisotropic g-factors for spins in single quantum states

J. R. Petta·D. C. Ralph
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Abstract

We have measured the full angular dependence, as a function of the direction of magnetic field, for the Zeeman splitting of individual energy states in copper nanoparticles. The g-factors for spin splitting are highly anisotropic, with angular variations as large as a factor of five. The angular dependence fits well to ellipsoids. Both the principal-axis directions and g-factor magnitudes vary between different energy levels within one nanoparticle. The variations agree quantitatively with random-matrix theory predictions which incorporate spin-orbit coupling.

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J. R. Petta, D. C. Ralph. 2002-06-22. Measurements of strongly-anisotropic g-factors for spins in single quantum states. https://doi.org/10.1103/physrevlett.89.156802

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