We review recent experimental and theoretical work on ultrasmall metallic grains, ie grains
sufficiently small that the conduction electron energy spectrum becomes discrete. The …

We review recent experimental and theoretical work on superconductivity in ultrasmall
metallic grains, ie grains sufficiently small that the conduction electron energy spectrum …

Several recent papers have predicted parity effects, based on even-odd ground state energy
differences, in ultrasmall (nm scale) superconductors having a discrete electronic …

We explain the observation of clusters in the tunneling resonance spectra of ultrasmall
metallic particles of a few nanometer size. Each cluster of resonances is identified with one …

We present a truly canonical theory of superconductivity in ultrasmall metallic grains by
variationally optimizing fixed-N projected BCS wave functions, which yields the first full …

We study the superconductivity in small grains in the regime when the quantum level
spacing δ ɛ is comparable to the gap Δ. As δ ɛ is increased, the system crosses over from …

We investigate the breakdown of BCS superconductivity in ultrasmall metallic grains as a
function of particle size (characterized by the mean spacing d between discrete electronic …

Metallic particles with linear dimensions d small compared with other characteristic lengths
(like the wavelength of electromagnetic radiation, the de Broglie wavelength of the …

We use electron tunneling to measure electronic energy levels in individual nm-scale Al
particles. For sufficiently large particles (≳ 5 nm in radius), the eigenstate energies reveal …

This paper is devoted to the magnetic properties of isolated mesoscopic grains. We
demonstrate that under very general conditions the electron-electron interactions in such …