Wednesday, May 9, 2012

1205.1122 (Koushik Ray et al.)

An Algebraic Geometry Method for Calculating DOS for 2D tight binding

Koushik Ray, Siddhartha Sen
An algebraic geometry method is used to calculate the moments of the electron density of states as a function of the energy for lattices in the tight binding approximation. Interpreting the moments as the Mellin transform of the density allows writing down a formula for the density as an inverse Mellin transform. The method is illustrated by working out the density function for the two-dimensional square and honeycomb lattices.
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