Mesoscopic Spin-Magnetism

Details Mesoscopic Spin-Magnetism Mesoscopic Spin-Magnetism

1994-11-03

arxiv.org/abs/cond-mat/9411020v1

Physics

Condensed Matter

8 pages, RevTex, 1 figure

Scientific paper

10.1103/PhysRevLett.74.1855

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 magnetization is found to fluctuate reproducibly about the mean. These fluctuations directly probe the energy level statistics.

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