Quasiparticle and Spin Excitation Spectra in the Normal andd-Wave Superconducting State of the Two-Dimensional Hubbard Model

1995 ◽  
Vol 74 (5) ◽  
pp. 793-796 ◽  
Author(s):  
T. Dahm ◽  
L. Tewordt
Keyword(s):  
Hubbard Model ◽  
Superconducting State ◽  
Spin Excitation ◽  
Two Dimensional ◽  
Excitation Spectra

scholarly journals A CLASS OF COLLECTIVE EXCITATIONS OF THE HUBBARD MODEL: η EXCITATION OF THE NEGATIVE-U MODEL

1996 ◽  
Vol 10 (17) ◽  
pp. 2137-2166 ◽  
Author(s):  
EUGENE DEMLER ◽  
SHOU-CHENG ZHANG ◽  
NEJAT BULUT ◽  
DOUGLAS J. SCALAPINO
Keyword(s):  
Monte Carlo ◽  
Hubbard Model ◽  
Excitation Spectrum ◽  
Superconducting State ◽  
Linear Response ◽  
Linear Response Theory ◽  
Collective Excitations ◽  
Spin Excitation ◽  
Consistent Theory ◽  
Self Consistent

In this series of papers we present a detailed study of the particle-particle collective excitations of the Hubbard model, and their contribution to the density and spin excitation spectrum. In the first paper, we shall investigate the singlet particle-particle pair with momentum (π, π), the η particle, of the negative-U Hubbard model. We review three previously obtained theorems about the η particle and develop a self-consistent linear response theory which takes into account its contribution to the density excitation spectrum in the superconducting state. We show that this self-consistent theory agrees with the exact theorems as well as the results of numerical Monte Carlo simulations.

Stability and superconductivity of Ca-intercalated bilayer blue phosphorene

2021 ◽  
Author(s):  
Artur Durajski ◽  
Kamil Skoczylas ◽  
Radoslaw Szczesniak
Keyword(s):  
Superconducting State ◽  
Potential Application ◽  
Recent Experiment ◽  
Superconducting Devices ◽  
Bilayer Graphene ◽  
Two Dimensional ◽  
Twisted Bilayer Graphene ◽  
Blue Phosphorene

Superconductivity attracts much interest in two-dimensional compounds due to their potential application in nano-superconducting devices. Inspired by a recent experiment reporting the superconducting state in twisted bilayer graphene, here, based...

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
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