Doping dependence of the internal energy, spin-density-wave order parameter, and the chemical potential for the Hubbard model

1994 ◽  
Vol 49 (17) ◽  
pp. 11915-11918 ◽  
Author(s):  
Hongguang Chi ◽  
A. D. S. Nagi
Keyword(s):  
Hubbard Model ◽  
Internal Energy ◽  
Spin Density ◽  
Order Parameter ◽  
Chemical Potential ◽  
Density Wave ◽  
Spin Density Wave ◽  
Doping Dependence

COLLECTIVE FIELD THEORY TO MAGNETIC-FIELD-INDUCED SPIN-DENSITY-WAVE-STATE IN BECHGAARD SALTS, (TMTSF)2X

1993 ◽  
Vol 07 (19) ◽  
pp. 3415-3421 ◽  
Author(s):  
ALEXANDRE S. ROZHAVSKY
Keyword(s):  
Magnetic Field ◽  
Spin Density ◽  
Chemical Potential ◽  
Density Wave ◽  
Spin Density Wave ◽  
Hall Conductivity ◽  
Chiral Anomaly ◽  
Threshold Field ◽  
Wave State ◽  
Extended States

A field description of spin-density-wave (SDW) in a quasi-two-dimensional metal with open Fermi surface in magnetic field, is proposed. The SDW transition temperature, T c (H), and the Hall conductivity σxy, are calculated. The dependence T c (H) is found to be different from that of the Bardeen-Cooper-Schrieffer model, in particular, a threshold field, H c , found its natural explanation. It is proved that the quantized Hall conductivity arises from the chiral anomaly terms in the effective action provided there is pinning of chemical potential in the gap of extended states.

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.

Collective Modes of Incommensurate Spin Density Wave in One-Dimensional Hubbard Model

2001 ◽  
Vol 70 (3) ◽  
pp. 818-828 ◽  
Author(s):  
Masanori Ichioka ◽  
Eiji Kaneshita ◽  
Kazushige Machida
Keyword(s):  
Hubbard Model ◽  
Spin Density ◽  
Density Wave ◽  
Spin Density Wave ◽  
Collective Modes ◽  
One Dimensional

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
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