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Stripe-ordered superfluid and supersolid phases in the attractive Hofstadter-Hubbard model

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We use microscopic Bogoliubov-de Gennes formalism to explore the ground-state phase diagram of the single-band attractive Hofstadter-Hubbard model on a square lattice. We show that the interplay between the Hofstadter butterfly and superfluidity breaks spatial symmetry, and gives rise to stripe-ordered superfluid and supersolid phases in large parameter spaces. We also discuss the effects of a trapping potential and comment on the viability of observing stripe-ordered phases with cold Fermi gases.

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American Physical Society (APS)

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Optics, Physics

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Physical Review A

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10.1103/PhysRevA.91.011601

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