scholarly journals Phase diagram of the magnetic state obtained from a two-particle self-consistent analysis of the half-filled Hubbard model on a honeycomb lattice

2018 ◽  
Vol 969 ◽  
pp. 012095
Author(s):  
Hirohito Aizawa
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Magnetic State ◽  
Honeycomb Lattice ◽  
Self Consistent

scholarly journals Antiferromagnetism in the Hubbard model on the honeycomb lattice: A two-particle self-consistent study

2015 ◽  
Vol 92 (4) ◽  
Author(s):  
S. Arya ◽  
P. V. Sriluckshmy ◽  
S. R. Hassan ◽  
A.-M. S. Tremblay
Keyword(s):  
Hubbard Model ◽  
Honeycomb Lattice ◽  
Self Consistent

GROUND STATE PROPERTIES OF THE SIMPLIFIED HUBBARD MODEL

1992 ◽  
Vol 06 (20) ◽  
pp. 1245-1253 ◽  
Author(s):  
PAVOL FARKASOVSKY
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Magnetic State ◽  
Lattice Structure ◽  
Total Spin ◽  
Quantum Mechanical ◽  
Spin Singlet

We present the exact solution of the simplified Hubbard model in which only one kind of electrons can hop and this quantum mechanical hopping of electrons is assumed to be unconstrained. It is shown that the model still behaves non-trivially, although it no longer depends on the lattice structure and the dimensionality of the system. For this case we find: (i) a gap in the ground state energy always exists at the half-filled band point (n = 1), (ii) a preferred magnetic state at n = 1 and large U is a total spin singlet, (iii) U-dependence of the ground state energy has qualitatively the same form as one of the conventional Hubbard model with the (t2/U)-behavior at large U. A phase diagram of the model is discussed.

scholarly journals Magnetic state of K0.8Fe1.6Se2from a five-orbital Hubbard model in the Hartree-Fock approximation

2011 ◽  
Vol 84 (14) ◽  
Author(s):  
Qinlong Luo ◽  
Andrew Nicholson ◽  
José Riera ◽  
Dao-Xin Yao ◽  
Adriana Moreo ◽  
...  
Keyword(s):  
Hubbard Model ◽  
Magnetic State ◽  
Hartree Fock

scholarly journals Phase diagram of the Bose-Hubbard Model

1994 ◽  
Vol 26 (7) ◽  
pp. 545-550 ◽  
Author(s):  
J. K Freericks ◽  
H Monien
Keyword(s):  
Phase Diagram ◽  
Hubbard Model

Phase diagram of an extended Hubbard model with correlated hopping at half filling

1995 ◽  
Vol 51 (19) ◽  
pp. 13774-13777 ◽  
Author(s):  
A. A. Aligia ◽  
Liliana Arrachea ◽  
E. R. Gagliano
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Extended Hubbard Model ◽  
Half Filling

scholarly journals Kane-Mele-Hubbard model on theπ-flux honeycomb lattice

2014 ◽  
Vol 90 (7) ◽  
Author(s):  
Martin Bercx ◽  
Martin Hohenadler ◽  
Fakher F. Assaad
Keyword(s):  
Hubbard Model ◽  
Honeycomb Lattice

scholarly journals Phase diagram of the two-chain Hubbard model

1999 ◽  
Vol 59 (4) ◽  
pp. 2587-2590 ◽  
Author(s):  
Youngho Park ◽  
Shoudan Liang ◽  
T. K. Lee
Keyword(s):  
Phase Diagram ◽  
Hubbard Model

T = 0 phase diagram of the 1D Hubbard model with magnetic interactions in the narrow band limit

Open Physics ◽  
2012 ◽  
Vol 10 (3) ◽  
Author(s):  
Ferdinando Mancini ◽  
Evgeny Plekhanov ◽  
Gerardo Sica
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Narrow Band ◽  
Operator Method ◽  
Magnetic Interactions ◽  
Exchange Constant ◽  
Local Charge ◽  
Spin Interactions ◽  
Charge Interaction ◽  
Composite Operator Method

AbstractIn this paper we study a generalization of the Hubbard model by considering spin-spin interactions described by the exchange constant J. An external magnetic field his also taken into account. In the narrowband limit and for the 1D case, we present the exact solution obtained in the framework of the Green’s function formalism, using the Composite Operator Method. We report the T = 0 phase diagram for both ferro (J > 0) and anti-ferro (J < 0) couplings. The competition of the different energy scales (U, J, and h; being U the local charge interaction) generates a variety of phases and different charge and spin orderings.

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