Pair binding and enhancement of pairing correlations in asymmetric Hubbard ladders

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Original languageEnglish
Article number125117
JournalPhysical Review B
Volume107
Issue number12
Publication statusPublished - 7 Mar 2023

Abstract

Asymmetric two-leg Hubbard ladders with different on-site interactions $U_y$ and hoppings $t_y$ on each leg are investigated using the density-matrix renormalization group method and exact diagonalizations. The pairing found in symmetric ladders is robust against the introduction of the leg asymmetry. When studying pairing, one-band Hubbard ladder models are better described as one-dimensional correlated two-band models than as sublattices of higher-dimensional systems. The asymmetric Hubbard ladder provides us with a simple model for studying pairing in the crossover regime between charge-transfer and Mott insulators.

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Pair binding and enhancement of pairing correlations in asymmetric Hubbard ladders. / Abdelwahab, Anas; Polat, Gökmen; Jeckelmann, Eric.
In: Physical Review B, Vol. 107, No. 12, 125117, 07.03.2023.

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AU - Polat, Gökmen

AU - Jeckelmann, Eric

N1 - Publisher Copyright: © 2023 American Physical Society.

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Y1 - 2023/3/7

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