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Träfflista för sökning "LAR1:his srt2:(1990-1994)"

Sökning: LAR1:his > (1990-1994)

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21.
  • Nilsson, P. O., et al. (författare)
  • Prediction of image-state excitation by secondary beams in inverse-photoemission spectroscopy
  • 1993
  • Ingår i: Physical Review B Condensed Matter. - : American Physical Society. - 0163-1829 .- 1095-3795. ; 47:19, s. 12968-12971
  • Tidskriftsartikel (refereegranskat)abstract
    • Excitation of image states is predicted to occur frequently in inverse-photoemission spectroscopy due to diffracted electron beams traveling almost parallel to the surface. A simple kinematic model, as well as full calculations using inverse low-energy electron-diffraction theory, show the effect in the case of Cd(0001).
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22.
  • Papadia, S., et al. (författare)
  • Electronic structure of metallic superlattices : Mo/V
  • 1992
  • Ingår i: Physical Review B Condensed Matter. - : American Physical Society. - 0163-1829 .- 1095-3795. ; 45:4, s. 1857-1868
  • Tidskriftsartikel (refereegranskat)abstract
    • The electronic structure for a metallic superlattice system, Mo/V, has been calculated using the linear muffin-tin orbital method in the atomic-sphere approximation (ASA). Total energies have been calculated in the local-density approximation (LDA). Emphasis has been given to the electronic-density variation in these materials in order to understand hydrogen storage in metallic superlattices. It is found, within effective-medium theory, that the balance between charge transfer at the interfaces and volume changes of the constituents determines preferred hydrogen sites in Mo/V. Total-energy considerations favor a tetragonal distortion of the Mo/V superlattice over a cubic structure. Results for the LDA bands, charge transfer, and density of states are compared to other electronic-structure calculations of metallic superlattices, which gives rise to a consistent picture of electronic effects in these systems. The dependence of the results on the ASA is discussed. © 1992 The American Physical Society.
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