Volume 76, Number 1, October 2006
|Page(s)||128 - 134|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||30 August 2006|
Interplay between incommensurate phases in the cuprates
Marian Smoluchowski Institute of Physics, Jagellonian University ul. Reymonta 4, PL-30059 Kraków, Poland
2 Laboratoire CRISMAT, UMR CNRS-ENSICAEN(ISMRA) 6508 6 Bld. du Maréchal Juin, F-14050 Caen, France
3 Max-Planck-Institut für Festkörperforschung Heisenbergstrasse 1, D-70569 Stuttgart, Germany
Accepted: 4 August 2006
We establish the qualitative behavior of the incommensurability ϵ, optimal domain wall filling ν and chemical potential μ for increasing doping by a systematic slave-boson study of an array of vertical stripes separated by up to lattice constants. Our findings obtained in the Hubbard model with the next-nearest neighbor hopping agree qualitatively with the experimental data for the cuprates in the doping regime . It is found that t' modifies the optimal filling ν and thus triggers the crossover to the diagonal (1,1) spiral phase at increasing doping, stabilized already at for .
PACS: 74.72.-h – Cuprate superconductors (high-Tc and insulating parent compounds) / 71.45.Lr – Charge-density-wave systems / 71.10.Fd – Lattice fermion models (Hubbard model, etc.)
© EDP Sciences, 2006
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