Destruction of the Fermi surface due to pseudogap fluctuations in correlated systems

✍ Scribed by M.V. Sadovskii; E.Z. Kuchinskii; I.A. Nekrasov

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 376 KB
• Volume: 460-462
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2007.03.367

✦ Synopsis

Pseudogap phenomena in strongly correlated systems have essential spatial length scale dependence [M.V. Sadovskii, Physics -Uspekhi 44 (2001) 515]. To merge pseudogap physics and strong electron correlations we generalize the dynamical-mean field theory (DMFT) [A. Georges, G. Kotliar, W. Krauth, M.J. Rozenberg, Rev. Mod. Phys. 68 (1996) 13]. Dependence on correlation length of pseudogap fluctuations via additional (momentum dependent) self-energy R k is included into conventional DMFT equations. The self-energy R k describes non-local dynamical correlations induced either by short-ranged collective SDW-like antiferromagnetic spin or CDW-like charge fluctuations [