TY - JOUR
T1 - Anomalous temperature dependence of the single-particle spectrum in the organic conductor TTF-TCNQ
AU - Bulut, N.
AU - Matsueda, H.
AU - Tohyama, T.
AU - Maekawa, S.
PY - 2006
Y1 - 2006
N2 - The angle-resolved photoemission spectrum of the organic conductor TTF-TCNQ exhibits an unusual transfer of spectral weight over a wide energy range for temperatures 60 K<T<260 K. In order to investigate the origin of this finding, here we report numerical results on the single-particle spectral weight A(k,ω) for the one-dimensional (1D) Hubbard model and, in addition, for the 1D extended Hubbard and the 1D Hubbard-Holstein models. Comparisons with the photoemission data suggest that the 1D Hubbard model is not sufficient for explaining the unusual T dependence, and the long-range part of the Coulomb repulsion also needs to be included.
AB - The angle-resolved photoemission spectrum of the organic conductor TTF-TCNQ exhibits an unusual transfer of spectral weight over a wide energy range for temperatures 60 K<T<260 K. In order to investigate the origin of this finding, here we report numerical results on the single-particle spectral weight A(k,ω) for the one-dimensional (1D) Hubbard model and, in addition, for the 1D extended Hubbard and the 1D Hubbard-Holstein models. Comparisons with the photoemission data suggest that the 1D Hubbard model is not sufficient for explaining the unusual T dependence, and the long-range part of the Coulomb repulsion also needs to be included.
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U2 - 10.1103/PhysRevB.74.113106
DO - 10.1103/PhysRevB.74.113106
M3 - Article
AN - SCOPUS:33748923783
SN - 0163-1829
VL - 74
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 11
M1 - 113106
ER -