Exponential decay properties of Wannier functions and related quantities.
Phys Rev Lett
; 86(23): 5341-4, 2001 Jun 04.
Article
em En
| MEDLINE
| ID: mdl-11384493
ABSTRACT
The spatial decay properties of Wannier functions and related quantities have been investigated using analytical and numerical methods. We find that the form of the decay is a power law times an exponential, with a particular power-law exponent that is universal for each kind of quantity. In one dimension we find an exponent of -3/4 for Wannier functions, -1/2 for the density matrix and for energy matrix elements, and -1/2 or -3/2 for different constructions of nonorthonormal Wannier-like functions.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2001
Tipo de documento:
Article