First-principles evaluation of dynamical response and plasmon dispersion in metals.
作者： Andrew A. Quong , Adolfo G. Eguiluz
DOI: 10.1103/PHYSREVLETT.70.3955
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摘要: We report an ab initio evaluation of the dynamical density-response function for real Al and Na. The method we employ is a generalization Dalgarno-Lewis scheme perturbation theory to systems with continuous spectrum problems. crystal lattice found lower plasmon frequency large wave vectors by as much 4 eV. For this metal, agreement experiment excellent in time-dependent local-density approximation exchange correlation. «anomalous» dispersion observed Na assigned subtler exchange-correlation erects
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