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NMP‐TCNQ: A Realization of the Disordered Hubbard Model
Author(s) -
Papatriantafillou C.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220880233
Subject(s) - hubbard model , realization (probability) , condensed matter physics , charge (physics) , electronic correlation , statistical physics , physics , range (aeronautics) , density of states , materials science , electron , quantum mechanics , mathematics , statistics , superconductivity , composite material
Several quantitative models have been proposed for the electronic structure of the organic charge transfer salt NMP‐TCNQ. They range from the periodic Hubbard model that emphasizes the role of electron correlation in the material, to models that emphasize the role of its intrinsic static disorder. A detailed study is made of the dielectric properties of the material, and it is found that the intrinsic static disorder depends on the electronic density of states at the Fermi level. Then, considering the system as a realization of the one‐dimensional disordered Hubbard model and using available experimental data, the intrinsic disorder and other band parameters are calculated.