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• W1988976714 abstract "We study a half-filled ladder of spinless fermions. We show that contrary to a single chain, the ladder becomes a Mott insulator for arbitrarily small repulsive interactions. We obtain the full phase diagram and physical quantities such as the charge gap. We show that there is only a single insulating phase for repulsive interactions, regardless of the strength of the interchain hopping and single chain Mott gap. There is thus no confinement-deconfinement transition in this system but a simple crossover. Using bosonization with the renormalization group we show that upon doping the system becomes a Luttinger liquid with a universal parameter $K=1/2$ different from the one of the single chain $(K=1/4).$" @default.
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• W1988976714 date "2001-01-09" @default.
• W1988976714 modified "2023-09-30" @default.
• W1988976714 title "Spinless fermion ladders at half filling" @default.
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• W1988976714 doi "https://doi.org/10.1103/physrevb.63.045121" @default.
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