scholarly journals Strong-coupling approach to the Mott-Hubbard insulator on a Bethe lattice in dynamical mean-field theory

2011 ◽  
Vol 83 (3) ◽  
Author(s):  
Daniel Ruhl ◽  
Florian Gebhard
Keyword(s):  
Field Theory ◽  
Strong Coupling ◽  
Mean Field Theory ◽  
Mean Field ◽  
Bethe Lattice ◽  
Dynamical Mean Field Theory ◽  
Coupling Approach

scholarly journals Strong-coupling formula for momentum-dependent susceptibilities in dynamical mean-field theory

2019 ◽  
Vol 99 (16) ◽  
Author(s):  
Junya Otsuki ◽  
Kazuyoshi Yoshimi ◽  
Hiroshi Shinaoka ◽  
Yusuke Nomura
Keyword(s):  
Field Theory ◽  
Strong Coupling ◽  
Mean Field Theory ◽  
Mean Field ◽  
Dynamical Mean Field Theory

scholarly journals EQUATION-OF-MOTION APPROACH TO DYNAMICAL MEAN FIELD THEORY

2006 ◽  
Vol 20 (25) ◽  
pp. 1629-1636 ◽  
Author(s):  
JIAN-XIN ZHU ◽  
R. C. ALBERS ◽  
J. M. WILLS
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Bethe Lattice ◽  
Equation Of Motion ◽  
Spectral Weight ◽  
Dynamical Mean Field Theory ◽  
Strongly Correlated ◽  
Strongly Correlated Materials ◽  
Weight Transfer

We propose using an equation-of-motion approach as an impurity solver for dynamical mean field theory. As an illustration of this technique, we consider a finite-U Hubbard model defined on the Bethe lattice with infinite connectivity at arbitrary filling. Depending on the filling, the spectra that is obtained exhibits a quasiparticle peak, and lower and upper Hubbard bands as typical features of strongly correlated materials. The results are also compared and in good agreement with exact diagonalization. We also find a different picture of the spectral weight transfer than the iterative perturbation theory.

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