ARPES spectra of the stripe phase in the 2D t-J model

Details ARPES spectra of the stripe phase in the 2D t-J model ARPES spectra of the stripe phase in the 2D t-J model

2003-08-09

arxiv.org/abs/cond-mat/0308184v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages with 3 eps-figures

Scientific paper

The 2D t-J model with and without t' and t'' hopping-terms is studied by exact diagonalization on a 5 x 4 cluster, which realizes a hole stripe in y-direction in a dimerized singlet background. Next nearest hopping terms with a sign appropriate for hole-doped cuprates enhance the stripe formation. The dispersion of the quasiparticle-peaks in the single-particle spectrum is in good agreement with a simple bond operator theory for hole motion in the spin-Peierls phase, particularly so for realistic values of t' and t''. The resulting spectral weight distribution and Fermi surface agree well with experimental ARPES spectra on La_1.28 Nd_0.6 Sr_0.12 Cu O_4.

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