15 January 2008 New formalism in evaluation of the ground and few excited states of Hubbard chain nanostructures
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Abstract
A new, simple and efficient method is presented for calculation of the ground and a few excited states of Hubbard chain nanostructures. By using this method, the photoemission spectral function for organic charge transfer salt TTF-TCNQ, is calculated. For a chain with maximum 70 sites the result is in good agreement with the previous works but there is a difference for further number of sites in the chain, which is discussed in the text with all the specifics. We also show that a source of errors in density matrix renormalization group method for a one dimensional chain is the deficiency of the matrix product scheme for generating the desired states of the linear chain.
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E. Faizabadi, M. Soleimani, "New formalism in evaluation of the ground and few excited states of Hubbard chain nanostructures", Proc. SPIE 6831, Nanophotonics, Nanostructure, and Nanometrology II, 68311K (15 January 2008); doi: 10.1117/12.757917; https://doi.org/10.1117/12.757917
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