Impurity Scattering Effects in STM Studies of High-T_c Superconductors

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Recent STM measurements have observed many inhomogeneous patterns of the local density of states on the surface of high-T_c cuprates. As a first step to study such disordered strong correlated systems, we use the BdG equation for the t-t'-t"-J model with an impurity. The impurity is taken into account by a local potential or local variation of the hopping/exchange terms. Strong correlation is treated by a Gutzwiller mean-field theory with local Gutzwiller factors and local chemical potentials. It turned out that the potential impurity scattering is greatly suppressed, while the local variation of hoppings/exchanges is enhanced.
4 pages, 3 figures, SNS2007 proceedings

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Strongly Correlated Electrons, Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/210645

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0812.2593
 http://arxiv.org/abs/0812.2593
 J. Phys. Chem. Solids 69, 3046 (2008)
 doi:10.1016/j.jpcs.2008.06.039

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arXiv