Broken-symmetry states in solids with multiple bands
- 1 September 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 22 (5) , 2456-2465
- https://doi.org/10.1103/physrevb.22.2456
Abstract
Calculations are presented which show that an interacting -electron system can exhibit more general ground states than predicted by a simple Stoner theory of ferromagnetism, which usually neglects effects of -band degeneracy. The existence of five subbands leads to a situation where the interaction first changes the population of subbands without destroying spin degeneracy, and thus produces a less metallic but still paramagnetic state. Ferromagnetism occurs for larger values of the interaction. Numerically the calculations are performed for the canonical bands of face-centered- and body-centered-cubic structures.
Keywords
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