scholarly journals Strongly correlated electrons on the decorated honeycomb lattice studied with rotationally invariant slave-boson mean-field theory

2020 ◽  
Author(s):  
Henry Leonard Nourse
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Strongly Correlated Electrons ◽  
Honeycomb Lattice ◽  
Correlated Electrons ◽  
Strongly Correlated ◽  
Rotationally Invariant

PERIODICAL ANDERSON MODEL AND ELECTRON-PHONON INTERACTION

1993 ◽  
Vol 07 (01n03) ◽  
pp. 62-66
Author(s):  
IGOR S. SANDALOV
Keyword(s):  
Anderson Model ◽  
Mean Field Theory ◽  
Mean Field ◽  
Strongly Correlated Electrons ◽  
Correlated Electrons ◽  
Strongly Correlated ◽  
Zero Temperature ◽  
Phonon Interaction ◽  
Dynamic Matrix ◽  
Electron Phonon Interaction

The periodical Anderson model (PAM) is microscopically derived. It is shown that the PAM is a mean field theory for the electric potential. The mixing interaction (MI) consists of single- and two-particle contributions. The first is proportional to the overlap integral of localized and band wave functions and vanishes when band energies are on the Fermi surface. It leads to the absence of heavy-fermion effects in the theories based on the PAM with only this mixing term. Using the orthogonal basis this term vanishes only at zero temperature. Applicability of the Luttinger theorem to systems with strongly-correlated electrons (SSCE) is discussed. The phonon dynamic matrix and electron-phonon interaction (EPI) for SSCE are microscopically derived.

Nature of Non-magnetic Strongly-Correlated State in Plutonium

2006 ◽  
Vol 986 ◽  
Author(s):  
Leniod Purovskii ◽  
Alexander Shick ◽  
Ladislav Havela ◽  
Mikhail Katsnelson ◽  
Alexander Lichtenstein
Keyword(s):  
Field Theory ◽  
Density Functional ◽  
Local Density ◽  
Mean Field Theory ◽  
Mean Field ◽  
Dynamical Mean Field Theory ◽  
Cubic Phase ◽  
Face Centered Cubic ◽  
Strongly Correlated ◽  
Starting Point

AbstractLocal density approximation for the electronic structure calculations has been highly successful for non-correlated systems. The LDA scheme quite often failed for strongly correlated materials containing transition metals and rare-earth elements with complicated charge, spin and orbital ordering. Dynamical mean field theory in combination with the first-principle scheme (LDA+DMFT) can be a starting point to go beyond static density functional approximation and include effects of charge, spin and orbital fluctuations. Ab-initio relativistic dynamical mean-field theory is applied to resolve the long-standing controversy between theory and experiment in the “simple” face-centered cubic phase of plutonium called δ-Pu. In agreement with experiment, neither static nor dynamical magnetic moments are predicted. In addition, the quasiparticle density of states reproduces not only the peak close to the Fermi level, which explains the large coefficient of electronic specific heat, but also main 5f features observed in photoelectron spectroscopy.

scholarly journals Cellular dynamical mean-field theory study of an interacting topological honeycomb lattice model at finite temperature

2015 ◽  
Vol 91 (4) ◽  
Author(s):  
Yao-Hua Chen ◽  
Hsiang-Hsuan Hung ◽  
Guoxiong Su ◽  
Gregory A. Fiete ◽  
C. S. Ting
Keyword(s):  
Field Theory ◽  
Lattice Model ◽  
Finite Temperature ◽  
Mean Field Theory ◽  
Mean Field ◽  
Dynamical Mean Field Theory ◽  
Honeycomb Lattice
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