Role of interband mixing in exchange coupling and conduction-electron polarization in metals

R. E. Watson, Arthur J Freeman, S. Koide

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

The effect of interband mixing on the actual form of the exchange interaction J(k,k′) between a local moment and conduction electrons in a metal, and in turn on the induced conduction-electron spin density polarization, is investigated. Results of detailed calculations are reported which employ a realistic local moment (Hartree-Fock Gd3+ ion) and orthogonalized plane waves for the conduction electrons. As is well known, interband mixing induces a net negative conduction-electron spin moment, reducing and even reversing the positive moment induced by electrostatic exchange in the s-d or s-f interaction model. The main peak of the interband spin distribution is very diffuse, and the phase of the associated Friedel oscillations is shifted outwards. For the case of rare-earth interband mixing, these oscillations serve to enhance those already due to electrostatic exchange. In other words, while it is often assumed that the amplitude of the s-f Friedel oscillations faithfully reflects the net induced spin, this is not the case if s-f interband mixing occurs.

Original languageEnglish
Pages (from-to)625-630
Number of pages6
JournalPhysical Review
Volume186
Issue number3
DOIs
Publication statusPublished - 1969

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conduction electrons
moments
polarization
electron spin
metals
oscillations
electrostatics
reversing
plane waves
rare earth elements
interactions
ions
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Role of interband mixing in exchange coupling and conduction-electron polarization in metals. / Watson, R. E.; Freeman, Arthur J; Koide, S.

In: Physical Review, Vol. 186, No. 3, 1969, p. 625-630.

Research output: Contribution to journalArticle

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