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Stripe order in the underdoped region of the two-dimensional Hubbard model

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arxiv 1701.00054 v3 pith:3HUDXATJ submitted 2016-12-31 cond-mat.str-el

Bo-Xiao Zheng , Chia-Min Chung , Philippe Corboz , Georg Ehlers , Ming-Pu Qin , Reinhard M. Noack , Hao Shi , Steven R. White
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Shiwei Zhang Garnet Kin-Lic Chan
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classification cond-mat.str-el
keywords ordermodelnumericalstripeunderdopedhubbardmaterialsmethods
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Competing inhomogeneous orders are a central feature of correlated electron materials including the high-temperature superconductors. The two- dimensional Hubbard model serves as the canonical microscopic physical model for such systems. Multiple orders have been proposed in the underdoped part of the phase diagram, which corresponds to a regime of maximum numerical difficulty. By combining the latest numerical methods in exhaustive simulations, we uncover the ordering in the underdoped ground state. We find a stripe order that has a highly compressible wavelength on an energy scale of a few Kelvin, with wavelength fluctuations coupled to pairing order. The favored filled stripe order is different from that seen in real materials. Our results demonstrate the power of modern numerical methods to solve microscopic models even in challenging settings.

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  1. Pair-Density Wave from Doping an Altermagnetic Mott Insulator

    cond-mat.str-el 2026-07 conditional novelty 7.0 of 10

    Doping an altermagnetic Mott insulator on the checkerboard t-J model yields a PDW coexisting with stripes under the reversed locking Q_PDW ≈ 2 Q_Stripe.

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