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Effect of the next‐nearest neighbor hopping on the stability and band structure of the incommensurate phases in the cuprates
Author(s) -
Raczkowski Marcin,
Frésard Raymond,
Oleś Andrzej M.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200674622
Subject(s) - cuprate , condensed matter physics , superconductivity , physics , antiferromagnetism , slave boson , doping , charge ordering , diagonal , charge (physics) , k nearest neighbors algorithm , spin (aerodynamics) , hubbard model , quantum mechanics , mathematics , geometry , artificial intelligence , computer science , thermodynamics
Using 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 La 2– x Sr x CuO 4 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 YBa 2 Cu 3 O 6+ 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 YBa 2 Cu 3 O 6+ δ only in the highly underdoped regime. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)