Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-06-02
Europhysics Lett. 76, 128 (2006)
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 4 figures, EPL style
Scientific paper
10.1209/epl/i2006-10227-1
We establish the qualitative behavior of the incommensurability $\epsilon$, optimal domain wall filling $\nu$ and chemical potential $\mu$ for increasing doping by a systematic slave-boson study of an array of vertical stripes separated by up to $d=11$ lattice constants. Our findings obtained in the Hubbard model with the next-nearest neighbor hopping $t'=-0.15t$ agree qualitatively with the experimental data for the cuprates in the doping regime $x\lesssim 1/8$. It is found that $t'$ modifies the optimal filling $\nu$ and triggers the crossover to the diagonal (1,1) spiral phase at increasing doping, stabilized already at $x\simeq 0.09$ for $t'=-0.3t$.
Fresard Raymond
Oles' Andrzej M.
Raczkowski Marcin
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