Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-12-12
Phys. Rev. B 79, 224507 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
4 figures, 1 table, 4 pages, important changes (not affecting results)
Scientific paper
10.1103/PhysRevB.79.224507
Scanning tunneling microscopy (STM) by providing images of the effects of individual zinc-impurities in cuprate superconductors with unprecedented atomic-resolution offers a stringent test to models of correlated fermions for high-temperature superconductors. Using a t-J model supplemented by Variational Monte Carlo many-body techniques, the spatial dependence of the hole density and of the valence bond and superconducting pairing amplitudes around the impurity are computed. A cross-shaped four-fold symmetric structure very similar to the observed STM observation is found, giving strong credit to the model.
Capello Manuela
Poilblanc Didier
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