Fluctuating spin g-tensor in small metal grains

Details Fluctuating spin g-tensor in small metal grains Fluctuating spin g-tensor in small metal grains

2000-02-09

arxiv.org/abs/cond-mat/0002139v1

Phys. Rev. Lett. 85, 369 (2000)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, RevTeX; 3 figures

Scientific paper

10.1103/PhysRevLett.85.369

In the presence of spin-orbit scattering, the splitting of an energy level in a generic small metal grain due to the Zeeman coupling to a magnetic field B depends on the direction of B, as a result of mesoscopic fluctuations. The anisotropy is described by the eigenvalues g_j^2 (j=1,2,3) of a tensor G, corresponding to the (squares of) g-factors along three principal axes. We consider the statistical distribution of G and find that the anisotropy is enhanced by eigenvalue repulsion between the g_j.

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