Spectral function of the one-dimensional Hubbard model away from half filling

Details Spectral function of the one-dimensional Hubbard model away from half filling Spectral function of the one-dimensional Hubbard model away from half filling

2004-02-26

arxiv.org/abs/cond-mat/0402664v2

Phys. Rev. Lett. 92, 256401 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

REVTEX, 4 pages including 4 EPS figures (changed); correct chemical potential used to define excitation energies in figures an

Scientific paper

10.1103/PhysRevLett.92.256401

We calculate the photoemission spectral function of the one-dimensional Hubbard model away from half filling using the dynamical density matrix renormalization group method. An approach for calculating momentum-dependent quantities in finite open chains is presented. Comparison with exact Bethe Ansatz results demonstrates the unprecedented accuracy of our method. Our results show that the photoemission spectrum of the quasi-one-dimensional conductor TTF-TCNQ provides evidence for spin-charge separation on the scale of the conduction band width.

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