We examine in this paper how van Hove critical points, in a given density-of-states distribution, modify the asymptotic behavior of the corresponding continued-fraction coefficients. Singularities within and at the boundary of a single connected band are discussed in detail, for one-, two-, and three-dimensional structures, in a simple and comprehensive way.
CONTINUED-FRACTION COEFFICIENTS IN THE PRESENCE OF CRITICAL-POINTS
GROSSO, GIUSEPPE;
1985-01-01
Abstract
We examine in this paper how van Hove critical points, in a given density-of-states distribution, modify the asymptotic behavior of the corresponding continued-fraction coefficients. Singularities within and at the boundary of a single connected band are discussed in detail, for one-, two-, and three-dimensional structures, in a simple and comprehensive way.File in questo prodotto:
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