Spectral functions of the Falicov-Kimball model with electronic ferroelectricity

Details Spectral functions of the Falicov-Kimball model with electronic ferroelectricity Spectral functions of the Falicov-Kimball model with electronic ferroelectricity

2003-02-26

arxiv.org/abs/cond-mat/0302554v2

Physical Review B, 68, 075111 (2003).

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.68.075111

We calculate the angular resolved photoemission spectrum of the Falicov-Kimball model with electronic ferroelectricity where $d$- and $f$-electrons have different hoppings. In mix-valence regimes, the presence of strong scattering processes between $d$-$f$ excitons and a hole, created by emission of an electron, leads to the formation of pseudospin polarons and novel electronic structures with bandwidth scaling with that of $d$-$f$ excitons. Especially, in the two-dimensional case, we find that flat regions exist near the bottom of the quasiparticle band in a wide range of the $d$- and $f$-level energy difference.

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