Physics – Condensed Matter – Materials Science
Scientific paper
2007-11-06
Rev. Mod. Phys. 80, 315 (2008)
Physics
Condensed Matter
Materials Science
to be published in Reviews of Modern Physics, vol 80, issue 1
Scientific paper
10.1103/RevModPhys.80.315
A review of new developments in theoretical and experimental electronic structure investigations of half-metallic ferromagnets (HMF) is presented. Being semiconductors for one spin projection and metals for another ones, these substances are promising magnetic materials for applications in spintronics (i.e., spin-dependent electronics). Classification of HMF by the peculiarities of their electronic structure and chemical bonding is discussed. Effects of electron-magnon interaction in HMF and their manifestations in magnetic, spectral, thermodynamic, and transport properties are considered. Especial attention is paid to appearance of non-quasiparticle states in the energy gap, which provide an instructive example of essentially many-body features in the electronic structure. State-of-art electronic calculations for correlated $d$-systems is discussed, and results for specific HMF (Heusler alloys, zinc-blende structure compounds, CrO$_{2},$ Fe$_{3}$O$_{4}$) are reviewed.
Chioncel Liviu
de Groot Robert A.
Irkhin Yu. V.
Katsnelson Mikhail I.
Lichtenstein Alexander I.
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