Spatial decay of the single-particle density matrix in insulators: analytic results in two and three dimensions.
نویسندگان
چکیده
Analytic results for the asymptotic decay of the electron density matrix in insulators have been obtained in all three dimensions (D = 1,2,3) for a tight-binding model defined on a simple cubic lattice. The anisotropic decay length is shown to be dependent on the energy parameters of the model. The existence of the power-law prefactor, proportional, variant r(-D/2), is demonstrated.
منابع مشابه
Spatial decay of the single-particle density matrix in tight-binding metals: Analytic results in two dimensions
S. N. Taraskin,* P. A. Fry, Xiaodong Zhang, D. A. Drabold, and S. R. Elliott Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom St.John’s College, University of Cambridge, St. John’s St., Cambridge CB2 1TP, United Kingdom Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701 ~Received 8 July 2002; revised manuscript received 19...
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عنوان ژورنال:
- Physical review letters
دوره 88 19 شماره
صفحات -
تاریخ انتشار 2002