First principle computation of stripes in cuprates

2004/02/05 by V. I. Anisimov, M. A. Korotin, A. S. Mylnikova +2 · 1 citation
Physics and Astronomy · #cond-mat.str-el #cond-mat.mtrl-sci #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.70.172501

published as Phys. Rev. B, 70, 172501 (2004) · 5 pages,4 figures

arxiv created 2004/02/05 · arxiv updated 2009/12/01

Abstract

We present a first principle computation of vertical stripes in La_15/8Sr_1/8CuO₄ within the LDA+U method. We find that Cu centered stripes are unstable toward O centered stripes. The metallic core of the stripe is quite wide and shows reduced magnetic moments with suppressed antiferromagnetic (AF) interactions. The system can be pictured as alternating metallic and AF two-leg ladders the latter with strong AF interaction and a large spin gap. The Fermi surface shows warping due to interstripe hybridization. The periodicity and amplitude of the warping is in good agreement with angle resolved photoemission experiment. We discuss the connection with low-energy theories of the cuprates.

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