Phys. Rev. B 40, 2354–2361 (1989)Metallic ferromagnetism in a single-band modelReceived 7 April 1989; published in the issue dated 1 August 1989 It is pointed out that certain off-diagonal matrix elements of the Coulomb interaction between Bloch electrons are likely to play a fundamental role in metallic ferromagnetism. These matrix elements lower the energy when the two interacting electrons are in states of opposite bonding character, thus favoring a situation where up and down electron bands have different fillings. It is proposed that this effect can explain the occurrence of metallic ferromagnetism in solids, without band degeneracy playing an essential role. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.40.2354
DOI:
10.1103/PhysRevB.40.2354
PACS:
75.10.Lp, 75.30.Et
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