gFactors of Discrete Levels in Nanoparticles
Abstract
Spinorbit scattering suppresses Zeeman splitting of individual energy levels in small metal particles. This suppression becomes significant when the spinorbit scattering rate τ^{1}_{so} is comparable to the quantum level spacing δ. At small δτ_{so} the gfactor exhibits strong mesoscopic fluctuations. We find the shape of their distribution function using the random matrix theory, and express its parameters in terms of physical characteristics: τ_{so}, δ, the electron mean free path l, and the particle size L. At δτ_{so}>0 the average gfactor levels off at a small value g~\(l/L\)^{1/2}. However, in 2D quantum dots the gfactor is strongly enhanced by spinorbit coupling.
 Publication:

Physical Review Letters
 Pub Date:
 September 2000
 DOI:
 10.1103/PhysRevLett.85.2789
 arXiv:
 arXiv:condmat/0001431
 Bibcode:
 2000PhRvL..85.2789M
 Keywords:

 Condensed Matter  Mesoscale and Nanoscale Physics
 EPrint:
 4 pages