Electron correlations, magnetism, and structure of small clusters
- 13 June 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 72 (24), 3879-3882
- https://doi.org/10.1103/PhysRevLett.72.3879
Abstract
Many-body properties of N-atom clusters having N≤8 are calculated exactly in the framework of the Hubbard model for all possible nonequivalent cluster structures. The most stable structure and the corresponding total spin S are obtained rigorously as a function of the Coulomb-interaction strength U/t and the number of electrons. Results for the stability of cluster ferromagnetism against electronic excitations and structural changes are obtained for the first time. The resulting interplay between electron correlations, magnetism, and cluster structure is determined.This publication has 23 references indexed in Scilit:
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