Long-range correlation energies and off-diagonal interactions for the π electronic systems

2008/03/02 by Hua Zhao, Zhao, Hua
Physics and Astronomy · #FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #cond-mat.other

paper · pdf · doi:10.48550/arxiv.0803.0127

5 pages, 2 tables, New version, Submitted

arxiv created 2008/08/09 · arxiv updated 2009/12/01

Abstract

The long-range correlation energies and the off-diagonal interactions are studied and a general formula for correlation energy E_c of the π electron systems is given, which is beyond the nearest-neighbor electron-electron interactions and includes the off-diagonal interactions. It is found that the effects of the off-diagonal interactions W and X on the correlation energies are opposite, but the influence of X on the correlation energies is much stronger than that of W on the correlation energies, and the correlation energies decrease with increasing the screening effect.

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