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Particle-hole symmetry breaking in the pseudogap state of Pb0.55Bi1.5Sr1.6La0.4CuO6+δ: A quantum chemical perspective

Itai Panas (Institutionen för kemi- och bioteknik, Oorganisk miljökemi)
Physical Review B (1550-235X ). Vol. 83 (2011), 2 , p. 024508 (I-IX).
[Artikel, refereegranskad vetenskaplig]

Two Bi2201 model systems are employed to demonstrate how, beside the Cu-O σ band, a second band of purely O 2pπ character can be made to cross the Fermi level due to its sensitivity to the local crystal field. This result is employed to explain the particle-hole symmetry breaking across the pseudogap recently reported by Shen and co-workers [see M. Hashimoto et al., Nature Phys. 6, 414 (2010).]. Support for a two-bands-on-a-checkerboard candidate mechanism for high-Tc superconductivity is claimed. Analysis based on band structures, partial density of states, and sum over states densities scanning-tunneling-microscopy-type images is provided.

Nyckelord: Pseudogap, STM, cuprate, superconductivity, mechanism, checkerboard, band structure, crystal field, charge carrier inhomogeneity

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Denna post skapades 2011-01-25. Senast ändrad 2011-05-09.
CPL Pubid: 136077


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Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)


Nanovetenskap och nanoteknik
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