Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-06-02
Journal of Physics and Chemistry of Solids Volume 72, Issue 5, May 2011, Pages 371-375
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures, 1 table, SNS2010 proceedings (24-28 May 2010, Shanghai, China)
Scientific paper
10.1016/j.jpcs.2010.10.081
LDA+DMFT+Sigma_k approach was applied to describe pseudogap phase of several prototype high-Tc compounds e.g. hole doped Bi2212 and LSCO systems and electron doped NCCO and PCCO, demonstrating qualitative difference of the Fermi surfaces (FS) for these systems. Namely for Bi2212 and LSCO the so called "hot-spots" (intersection of a bare FS and AFM Brillouin zone (BZ) boundary), where scattering on pseudogap fluctuations is most intensive were not observed. Instead here we have Fermi arcs with smeared FS close to the BZ boundary. However for NCCO and PCCO "hot-spots" are clearly visible. This qualitative difference is shown to have material specific origin. Good agreement with known ARPES data was demon strated not only for FS maps but also for spectral function maps (quasiparticle bands in cluding lifetime and interaction broadening).
Kuchinskii E. Z.
Nekrasov I. A.
Sadovskii M. V.
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