Non-local composite spin-lattice polarons in high temperature superconductors

Details Non-local composite spin-lattice polarons in high temperature superconductors Non-local composite spin-lattice polarons in high temperature superconductors

2007-07-26

arxiv.org/abs/0707.3875v1

Phys. Rev. Lett. 99, 146405 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.99.146405

The non-local nature of the polaron formation in t-t'-t"-J model is studied in large lattices up to 64 sites by developing a new numerical method. We show that the effect of longer-range hoppings t' and t" is a large anisotropy of the electron-phonon interaction (EPI) leading to a completely different influence of EPI on the nodal and antinodal points in agreement with the experiments. Furthermore, nonlocal EPI preserves polaron's quantum motion, which destroys the antiferromagnetic order effectively, even at strong coupling regime, although the quasi-particle weight in angle-resolved-photoemission spectroscopy is strongly suppressed.

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