Temperature dependence of spectral functions for the one-dimensional Hubbard model: comparison with experiments

Abstract

We study the temperature dependence of the single particle spectral function as well as of the dynamical spin and charge structure factors for the one-dimensional Hubbard model using the finite temperature auxiliary field quantum Monte Carlo algorithm. The parameters of our simulations are chosen so to at best describe the low temperature photoemission spectra of the organic conductor TTF-TCNQ. Defining a magnetic energy scale, T_J, which marks the onset of short ranged 2k_f magnetic fluctuations, we conclude that for temperatures T < T_J the ground state features of the single particle spectral function are apparent in the finite temperature data. Above T_J spectral weight transfer over a scale set by the hopping t is observed. In contrast, photoemission data points to a lower energy scale below which spectral weight transfer occurs. Discrepancies between Hubbard model calculations and experiments are discussed.

arXiv comment6 pages, 7 Figures

References in corpus (5)

• Spectral function of the one-dimensional Hubbard model away from half filling
• Shadow band in the one-dimensional large $U$ Hubbard model
• Electronic structure of the quasi-one-dimensional organic conductor TTF-TCNQ
• Spectral properties of the one-dimensional Hubbard model
• Temperature dependence of spinon and holon excitations in one-dimensional Mott insulators

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