2006
DOI: 10.1103/physrevb.73.092506
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Abstract: Spatial 4a × 4a modulations, with a the lattice constant of CuO2 planes, or the so called checkerboards can arise from double-Q spin density wave (SDW) with Q1 = (±π/a, ±3π/4a) and Q2 = (±3π/4a, ±π/a). When multi-Q pair density wave, that is, the condensation of dγ-wave Cooper pairs with zero total momenta, ±2Q1, ±2Q2, ±4Q1, ±4Q2, and so on is induced by the SDW, gaps can have fine structures similar to those of the so called zero-temperature pseudogaps.PACS numbers: 74.20.-z, 75.10.-b, 74.90.+n, 71.10.-w …

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