Matches in SemOpenAlex for { <https://semopenalex.org/work/W2048572892> ?p ?o ?g. }
- W2048572892 abstract "This paper introduces key ingredients of the dielectric response of $ensuremath{alpha}$-alumina that go beyond an independent-particle (IP) treatment of the valence-electron excitations. The optical-response functions were calculated from first- principles both at the Bethe--Salpeter and the random-phase approximation (RPA) levels. Excitonic effects obtained within the Bethe--Salpeter framework were found essential for reproducing the low-energy part of the experimental spectra (below 15 eV) and the bound exciton in particular. For higher energies, local-field effects introduced through the RPA modified considerably the IP results and provided a satisfactory account of the reflectivity spectra and of the position and shape of the dominant bulk plasmon resonance in the electron energy-loss spectra." @default.
- W2048572892 created "2016-06-24" @default.
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- W2048572892 date "2011-05-25" @default.
- W2048572892 modified "2023-09-23" @default.
- W2048572892 title "Local-field and excitonic effects in the optical response of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>α</mml:mi></mml:mrow></mml:math>-alumina" @default.
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- W2048572892 doi "https://doi.org/10.1103/physrevb.83.195129" @default.
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