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- W4384695964 abstract "Pair-density waves (PDW) are superconducting states that spontaneously break translation symmetry in systems with time-reversal symmetry (TRS). Evidence for PDW has been seen in several recent experiments, as well as in the pseudogap regime in cuprates. Theoretical understanding of PDW has been largely restricted to phenomenological and numerical studies, while microscopic theories typically require strong-coupling or fine-tuning. In this work, we provide a novel symmetry-based mechanism under which PDW emerges as a weak coupling instability of a 2D TRS metal. Combining mean-field and renormalization group analyses, we identify a weak-coupling instability towards a triplet PDW realized in the $pi$-flux square lattice model with on-site repulsion and moderate nearest-neighbor attraction when the Fermi level crosses Van Hove singularities at 1/4 and 3/4 fillings. This PDW is protected by the magnetic translation symmetries characteristic of Hofstadter systems, of which the $pi$-flux lattice is a special time-reversal symmetric case." @default.
- W4384695964 created "2023-07-20" @default.
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- W4384695964 date "2023-07-18" @default.
- W4384695964 modified "2023-09-30" @default.
- W4384695964 title "Triplet pair density wave superconductivity on the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>π</mml:mi></mml:math> -flux square lattice" @default.
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- W4384695964 doi "https://doi.org/10.1103/physrevb.108.035135" @default.
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