Mesoscopic fluctuations of the ground state spin of a small metal particle
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❄️ cond-mat.mes-hall
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groundspinstatesmallalreadyappreciableapproximationbelow
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We study the statistical distribution of the ground state spin for an ensemble of small metallic grains, using a random-matrix toy model. Using the Hartree Fock approximation, we find that already for interaction strengths well below the Stoner criterion there is an appreciable probability that the ground state has a finite, nonzero spin. Possible relations to experiments are discussed.
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