Electron spectral density of the half-filled Hubbard model in the atomic limit at finite temperature

Open Physics ◽  
2003 ◽  
Vol 1 (3) ◽  
Author(s):  
Sergei Ovchinnikov ◽  
Elena Shneyder
Keyword(s):  
Low Temperature ◽  
Spectral Density ◽  
Hubbard Model ◽  
Density Wave ◽  
Spin Density Wave ◽  
Long Range Order ◽  
Two Dimensional ◽  
Similar Form ◽  
Atomic Limit ◽  
Ordered State

AbstractWe have calculated the spectral function and density of states of halffilled two-dimensional Hubbard model in the Hubbard-I approximation assuming an antiferromagnetic long range order at low temperature and compared results to the QMC data. It occurs that calculated functions are in a qualitative agreement with the QMC one. We have also shown that Neel ordered state dispersion has the similar form to the spin density wave one.

PRECURSOR OF ANTIFERROMAGNETIC BANDS IN THE HALF-FILLED TWO-DIMENSIONAL HUBBARD MODEL

1999 ◽  
Vol 13 (27) ◽  
pp. 3183-3192
Author(s):  
BUMSOO KYUNG
Keyword(s):  
Hubbard Model ◽  
Density Of States ◽  
Density Wave ◽  
Spin Density Wave ◽  
Local Maximum ◽  
Two Dimensional ◽  
Intermediate Coupling ◽  
Critical Fluctuations ◽  
Wave Approximation ◽  
Good Agreement

We study the half-filled two-dimensional Hubbard model in the intermediate coupling regime. As temperature is decreased for a two-dimensional half-filled band, two-dimensional critical fluctuations give rise to a strong local maximum in | Im Σ(k F , ω)| at ω=0, leading to a split peak with a pseudogap inside in the spectral function and the density of states. The calculated energy dispersion is in good agreement with that of spin density wave approximation.

scholarly journals Incommensurate Spin-Density Wave in Two-Dimensional Hubbard Model

2012 ◽  
Vol 190 ◽  
pp. 67-70 ◽  
Author(s):  
M.A. Timirgazin ◽  
Anatoly K. Arzhnikov ◽  
A.V. Vedyayev
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Ground State ◽  
Magnetic Phase ◽  
Density Wave ◽  
Spin Density Wave ◽  
Magnetic Phase Diagram ◽  
Two Dimensional ◽  
Magnetic Phases ◽  
Model Relation

We consider the magnetic phase diagram of the two-dimensional Hubbard model ona square lattice.We take into account both spiral and collinear incommensurate magnetic states.The possibility of phase separation of spiral magnetic phases is taken into consideration as well.Our study shows that all the listed phases appear to be the ground state at certain parametersof the model. Relation of the obtained results to real materials, e.g. Cu-based high-temperaturesuperconductors, is discussed.

scholarly journals Bond-located spin density wave phase in the two-dimensional (2D) ionic Hubbard model

2010 ◽  
Vol 12 (9) ◽  
pp. 093021 ◽  
Author(s):  
Hui-Min Chen ◽  
Hui Zhao ◽  
Hai-Qing Lin ◽  
Chang-Qin Wu
Keyword(s):  
Hubbard Model ◽  
Spin Density ◽  
Density Wave ◽  
Spin Density Wave ◽  
Two Dimensional ◽  
Wave Phase ◽  
Ionic Hubbard Model

Spin Density Wave States in Two Dimensional Hubbard Model

1992 ◽  
Vol 61 (6) ◽  
pp. 2027-2039 ◽  
Author(s):  
Masahiko Ichimura ◽  
Mitsutaka Fujita ◽  
Kenji Nakao
Keyword(s):  
Hubbard Model ◽  
Spin Density ◽  
Density Wave ◽  
Spin Density Wave ◽  
Two Dimensional ◽  
Wave States

Non-collinear spin density wave in a two-dimensional Hubbard model

1991 ◽  
Vol 185-189 ◽  
pp. 1665-1666
Author(s):  
M. Ichimura ◽  
M. Fujita ◽  
K. Nakao
Keyword(s):  
Hubbard Model ◽  
Spin Density ◽  
Density Wave ◽  
Spin Density Wave ◽  
Two Dimensional
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