Abstract
AbstractUsing a spin‐rotation invariant version of the slave‐boson approach we investigate the relative stability and band structure of various incommensurate phases in the cuprates. Our findings obtained in the Hubbard model with next‐nearest neighbor hopping –t ′/t ≃ 0.15, as appropriate for the La2–x Srx CuO4 family, support the formation of diagonal (vertical) stripe phases in the doping regime x = 1/16 (x = 1/8), respectively. In contrast, based on the fact that a larger value –t ′/t = 0.3 expected for YBa2Cu3O6+δ triggers a crossover to the diagonal (1,1) spiral phase at increasing doping, we argue that it might explain why the static charge order has been detected in YBa2Cu3O6+δ only in the highly underdoped regime. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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