Spectral functions and optical conductivity of spinless fermions on a checkerboard lattice

Details Spectral functions and optical conductivity of spinless fermions on a checkerboard lattice Spectral functions and optical conductivity of spinless fermions on a checkerboard lattice

2006-04-05

arxiv.org/abs/cond-mat/0604122v1

Phys. Rev. B 73, 125121 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

9 Pages, 9 Figures

Scientific paper

10.1103/PhysRevB.73.125121

We study the dynamical properties of spinless fermions on the checkerboard lattice. Our main interest is the limit of large nearest-neighbor repulsion $V$ as compared with hopping $|t|$. The spectral functions show broad low-energy excitation which are due to the dynamics of fractionally charged excitations. Furthermore, it is shown that the fractional charges contribute to the electrical current density.

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