Quasiparticle dispersion in the cuprate superconductors and the two-dimensional Hubbard model

1994 ◽  
Vol 50 (10) ◽  
pp. 7215-7218 ◽  
Author(s):  
N. Bulut ◽  
D.J. Scalapino ◽  
S.R. White
Keyword(s):  
Hubbard Model ◽  
Cuprate Superconductors ◽  
Two Dimensional

Pseudopotentials and the theory of high T c superconductivity

1991 ◽  
Vol 334 (1635) ◽  
pp. 473-479 ◽  
Keyword(s):  
Hubbard Model ◽  
Multiple Scattering ◽  
Cuprate Superconductors ◽  
Scattering Length ◽  
Two Dimensional ◽  
Scattering Technique ◽  
Set Up

I present two very different uses of the idea of pseudopotentials in the theory of cuprate superconductors. In the first, the ‘chemical pseudopotential’ scheme is used to set up the underlying Hubbard model which is appropriate for these substances; in the second, I show that the conventional multiple-scattering technique for constructing an effective scattering length theory does not converge for the two- dimensional Hubbard model.

scholarly journals INHOMOGENEOUS d-WAVE SUPERCONDUCTIVITY AND ANTIFERROMAGNETISM IN A TWO-DIMENSIONAL EXTENDED HUBBARD MODEL WITH NEAREST-NEIGHBOR ATTRACTIVE INTERACTION

2007 ◽  
Vol 21 (10) ◽  
pp. 573-584 ◽  
Author(s):  
W. P. SU
Keyword(s):  
Phase Separation ◽  
Hubbard Model ◽  
Cuprate Superconductors ◽  
Nearest Neighbor ◽  
Minimum Energy ◽  
Mean Field Approximation ◽  
Attractive Interaction ◽  
Two Dimensional ◽  
Extended Hubbard Model ◽  
D Wave

To understand the interplay of d-wave superconductivity and antiferromagnetism, we consider a two-dimensional extended Hubbard model with nearest neighbor attractive interaction. The Hamiltonian is solved in the mean field approximation on a finite lattice. In the impurity-free case, the minimum energy solutions show phase separation as predicted previously based on free energy argument. The phase separation tendency implies that the system can be easily rendered inhomogeneous by a small external perturbation. Explicit solutions of a model including weak impurity potentials are indeed inhomogeneous in the spin-density-wave and d-wave pairing order parameters. Relevance of the results to the inhomogeneous cuprate superconductors is discussed.

The pairing symmetries in the two-dimensional Hubbard model

2021 ◽  
pp. 127153
Author(s):  
Ke Liu ◽  
Shuhui Yang ◽  
Weiqi Li ◽  
Tao Ying ◽  
Jianqun Yang ◽  
...  
Keyword(s):  
Hubbard Model ◽  
Two Dimensional ◽  
Pairing Symmetries

scholarly journals Spin diffusion and spin conductivity in the two-dimensional Hubbard model

2021 ◽  
Vol 103 (15) ◽  
Author(s):  
Martin Ulaga ◽  
Jernej Mravlje ◽  
Jure Kokalj
Keyword(s):  
Hubbard Model ◽  
Spin Diffusion ◽  
Two Dimensional

scholarly journals Effect of electron correlations on the formation of spiral magnetic states in the two-dimensional t-t′ Hubbard model

JETP Letters ◽  
2013 ◽  
Vol 98 (3) ◽  
pp. 150-155 ◽  
Author(s):  
P. A. Igoshev ◽  
M. A. Timirgazin ◽  
A. K. Arzhnikov ◽  
V. Yu. Irkhin
Keyword(s):  
Hubbard Model ◽  
Two Dimensional ◽  
Electron Correlations ◽  
Magnetic States

scholarly journals Phase separation in the two-dimensional Hubbard model: A fixed-node quantum Monte Carlo study

1998 ◽  
Vol 58 (22) ◽  
pp. R14685-R14688 ◽  
Author(s):  
A. C. Cosentini ◽  
M. Capone ◽  
L. Guidoni ◽  
G. B. Bachelet
Keyword(s):  
Monte Carlo ◽  
Phase Separation ◽  
Hubbard Model ◽  
Quantum Monte Carlo ◽  
Monte Carlo Study ◽  
Two Dimensional ◽  
Fixed Node

scholarly journals Striped phases in the two-dimensional Hubbard model with long-range Coulomb interaction

1998 ◽  
Vol 58 (20) ◽  
pp. 13506-13509 ◽  
Author(s):  
G. Seibold ◽  
C. Castellani ◽  
C. Di Castro ◽  
M. Grilli
Keyword(s):  
Hubbard Model ◽  
Long Range ◽  
Coulomb Interaction ◽  
Two Dimensional ◽  
Striped Phases
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