Spin-density wave and superconductivity in an extended two-dimensional Hubbard model with nearest-neighbor attraction

2001 ◽  
Vol 64 (17) ◽  
Author(s):  
W. P. Su ◽  
Yan Chen
Keyword(s):  
Hubbard Model ◽  
Spin Density ◽  
Nearest Neighbor ◽  
Density Wave ◽  
Spin Density Wave ◽  
Two Dimensional

scholarly journals Superconductivity in the doped Hubbard model and its interplay with next-nearest hopping t′

Science ◽  
2019 ◽  
Vol 365 (6460) ◽  
pp. 1424-1428 ◽  
Author(s):  
Hong-Chen Jiang ◽  
Thomas P. Devereaux
Keyword(s):  
Hubbard Model ◽  
Charge Density ◽  
Spin Density ◽  
Charge Density Wave ◽  
Large Scale ◽  
Nearest Neighbor ◽  
High Temperature Superconductivity ◽  
Density Wave ◽  
Spin Density Wave ◽  
Hole Doping

The Hubbard model is widely believed to contain the essential ingredients of high-temperature superconductivity. However, proving definitively that the model supports superconductivity is challenging. Here, we report a large-scale density matrix renormalization group study of the lightly doped Hubbard model on four-leg cylinders at hole doping concentration δ = 12.5%. We reveal a delicate interplay between superconductivity and charge density wave and spin density wave orders tunable via next-nearest neighbor hopping t′. For finite t′, the ground state is consistent with a Luther-Emery liquid with power-law superconducting and charge density wave correlations associated with half-filled charge stripes. In contrast, for t′ = 0, superconducting correlations fall off exponentially, whereas charge density and spin density modulations are dominant. Our results indicate that a route to robust long-range superconductivity involves destabilizing insulating charge stripes in the doped Hubbard model.

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

Impurity effect on the two-dimensional spin density wave

1993 ◽  
Vol 48 (4) ◽  
pp. 497-501
Author(s):  
Ioan Bâldea ◽  
Marian Anghel
Keyword(s):  
Spin Density ◽  
Density Wave ◽  
Spin Density Wave ◽  
Impurity Effect ◽  
Two Dimensional
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