scholarly journals Ground-state phase diagram of the repulsive fermionict−t′Hubbard model on the square lattice from weak coupling

2016 ◽  
Vol 94 (8) ◽  
Author(s):  
Fedor Šimkovic ◽  
Xuan-Wen Liu ◽  
Youjin Deng ◽  
Evgeny Kozik
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Ground State ◽  
Weak Coupling ◽  
Square Lattice ◽  
Ground State Phase Diagram

GROUND STATE OF THE 2D EXTENDED HUBBARD MODEL WITH MORE THAN NEAREST-NEIGHBOR INTERACTIONS

2012 ◽  
Vol 26 (29) ◽  
pp. 1250156 ◽  
Author(s):  
S. HARIR ◽  
M. BENNAI ◽  
Y. BOUGHALEB
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Ground State ◽  
State Energy ◽  
Nearest Neighbor ◽  
Finite Size ◽  
Square Lattice ◽  
Extended Hubbard Model ◽  
Eigenvalues And Eigenvectors ◽  
Repulsion Energy

We investigate the ground state phase diagram of the two dimensional Extended Hubbard Model (EHM) with more than Nearest-Neighbor (NN) interactions for finite size system at low concentration. This EHM is solved analytically for finite square lattice at one-eighth filling. All eigenvalues and eigenvectors are given as a function of the on-site repulsion energy U and the off-site interaction energy Vij. The behavior of the ground state energy exhibits the emergence of phase diagram. The obtained results clearly underline that interactions exceeding NN distances in range can significantly influence the emergence of the ground state conductor–insulator transition.

The ground state phase diagram of the quantumJ1–J2spin-1/2 Heisenberg antiferromagnet on an anisotropic square lattice

2010 ◽  
Vol 2010 (06) ◽  
pp. P06022 ◽  
Author(s):  
Griffith Mendonça ◽  
Rodrigo Lapa ◽  
J Ricardo de Sousa ◽  
Minos A Neto ◽  
Kingshuk Majumdar ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Ground State ◽  
Square Lattice ◽  
Heisenberg Antiferromagnet ◽  
Ground State Phase Diagram

scholarly journals Emergent BCS regime of the two-dimensional fermionic Hubbard model: Ground-state phase diagram

2015 ◽  
Vol 110 (5) ◽  
pp. 57001 ◽  
Author(s):  
Youjin Deng ◽  
Evgeny Kozik ◽  
Nikolay V. Prokof'ev ◽  
Boris V. Svistunov
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Ground State ◽  
Two Dimensional ◽  
Ground State Phase Diagram
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