Shadow Bands and Tunneling Magnetoresistance in Itinerant Electron Ferromagnets

Details Shadow Bands and Tunneling Magnetoresistance in Itinerant Electron Ferromagnets Shadow Bands and Tunneling Magnetoresistance in Itinerant Electron Ferromagnets

1998-01-05

arxiv.org/abs/cond-mat/9801023v1

Physics

Condensed Matter

4 pages, 1 figure, submitted to Phys. Rev. Lett

Scientific paper

In itinerant electron ferromagnets spectral weight is transferred at finite temperatures from quasiparticle peaks located at majority and minority-spin band energies to shadow-band peaks. For a given Bloch wavevector and band index, the majority-spin shadow-band peak is located near the minority-spin quasiparticle energy and the minority-spin shadow-band peak is located near the majority-spin quasiparticle energy. This property can explain much of the temperature dependence seen in the magnetoresistance of magnetic tunnel junctions.

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