Mesoscopic Spin Magnetism

H. Mathur, M. Gökçedağ, A. Douglas Stone
1995 Physical Review Letters  
We investigate the spin-magnetism of mesoscopic metallic grains. In the average response of an ensemble of grains there are corrections to macroscopic behaviour due to both spectral fluctuations and electron-electron interactions. These corrections are a non-linear function of the magnetic field. Their temperature dependence is calculated numerically and analytically. An experiment is proposed to measure the unknown interaction coupling constant in the cooper channel. For a single sample the
more » ... netization is found to fluctuate reproducibly about the mean. These fluctuations directly probe the energy level statistics.
doi:10.1103/physrevlett.74.1855 pmid:10057774 fatcat:pkaub6pj2vcirdcha4qpvvxlhm