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Sökning: WFRF:(Molodtsov S. L.)

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1.
  • Dedkov, Y S, et al. (författare)
  • Correlations in the electronic structure of half-metallic ferromagnetic CrO2 films: An x-ray absorption and resonant photoemission spectroscopy study
  • 2005
  • Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 72:6
  • Tidskriftsartikel (refereegranskat)abstract
    • The electronic structure of high-quality CrO2(100) films was investigated by means of x-ray absorption and resonant photoemission spectroscopy at the 2p-3d excitation threshold. The obtained binding energy of the occupied Cr 3d states is in agreement with the results predicted within the local spin-density approximation using the dynamical mean-field theory [L. Craco , Phys. Rev. Lett. 90, 237203 (2003)]. The reported data support a model of CrO2 as a half-metallic ferromagnet with strong electron-correlation effects.
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3.
  • Grueneis, A., et al. (författare)
  • Electron-electron correlation in graphite : A combined angle-resolved photoemission and first-principles study
  • 2008
  • Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 100:3, s. 037601-
  • Tidskriftsartikel (refereegranskat)abstract
    • The full three-dimensional dispersion of the pi bands, Fermi velocities, and effective masses are measured with angle-resolved photoemission spectroscopy and compared to first-principles calculations. The band structure by density-functional theory underestimates the slope of the bands and the trigonal warping effect. Including electron-electron correlation on the level of the GW approximation, however, yields remarkable improvement in the vicinity of the Fermi level. This demonstrates the breakdown of the independent electron picture in semimetallic graphite and points toward a pronounced role of electron correlation for the interpretation of transport experiments and double-resonant Raman scattering for a wide range of carbon based materials.
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  • Resultat 1-4 av 4

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