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Quasiparticles in Magnetic Metals

  • D. C. Mattis
Part of the NATO Advanced Science Institute Series book series (NSSB, volume 88)

Abstract

The properties of a low-density electron gas are calculated, with all two-body scattering processes included in the t-matrix approximation. This yield a phase diagram indicating the possibility of itinerant electron ferromagnetism or antiferromagnetism. The results are confirmed at high density by an analysis of Nagaoka’s model of a half-filled band. The collective excitations are electron- and hole-like quasiparticles having an interaction-dependent effective mass, and magons. The role of the atomic exchange forces (“Hund’s rules”) are assessed quantitatively in a two-band model. Without such exchange, no magnetic moments can exist. This chapter highlights some of the distinctions between magnetism in metals and in non-metals.

Keywords

Ferromagnetic State Magnetic Metal Magnetic Ground State Ground State Phase Diagram Ferromagnetic Case 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • D. C. Mattis
    • 1
  1. 1.Department of PhysicsUniversity of UtahSalt Lake CityUSA

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