Mesoscopic Fluctuations Of Orbital Magnetic Response In Level-Quantized Metals

We evaluate the distribution function of mesoscopic fluctuations of orbital magnetic response in finite-size level-quantized metal particles and Aharonov-Bohm rings for temperatures smaller than the mean level spacing. We find a broad distribution with the reduced moments much larger than the mean. For strong spin-orbit interaction we find very long tails due to thermal activation of large effective moments of the electrons at the Fermi level.Comment: 5 page

Polarizability and Absorption of Small Conducting Particles in a Time-Varying Electromagnetic Field

We study small conducting particles and thin films in an oscillating longitudinal electric field. We find the charge, current, and field distribution in the particle, the polarizability and the electric dipole absorption. We account for Thomas-Fermi screening by adding a Fick's diffusion term to Ohm's law. Alternatively, we describe a particle as a dielectric body with a non-local dielectric constant which is derived in a microscopic linear-response theory. We show that both approaches are equivalent.Comment: 14 page