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

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 excitations which are due to the dynamics of fractionally charged excita...

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Veröffentlicht in:Physical review / B
1. Verfasser: Pollmann, Frank (VerfasserIn)
Weitere Verfasser: Fulde, Peter (VerfasserIn), Runge, Erich (VerfasserIn)
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Sprache:eng
Veröffentlicht: 2006
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