scholarly journals Spectral function of two-dimensional Fermi liquids

1998 ◽  
Vol 57 (15) ◽  
pp. 8873-8877 ◽  
Author(s):  
Christoph J. Halboth ◽  
Walter Metzner
Keyword(s):  
Spectral Function ◽  
Fermi Liquids ◽  
Two Dimensional

SO(5) SYMMETRY AND SINGLE PARTICLE SPECTRA

1999 ◽  
Vol 13 (24n25) ◽  
pp. 3039-3047
Author(s):  
M. G. ZACHER ◽  
A. DORNEICH ◽  
R. EDER ◽  
W. HANKE ◽  
S. C. ZHANG
Keyword(s):  
Spectral Function ◽  
Single Particle ◽  
Photoemission Spectrum ◽  
Two Dimensional ◽  
Ladder Model ◽  
Particle Spectra ◽  
Key Features

We discuss properties of a recently proposed SO(5) symmetric ladder model. Key features of the single particle spectral function that are emerging from the symmetry are numerically identified in the ladder model and in the photoemission spectrum of the two-dimensional t–J model.

scholarly journals Shear sound of two-dimensional Fermi liquids

2019 ◽  
Vol 99 (7) ◽  
Author(s):  
Jun Yong Khoo ◽  
Inti Sodemann Villadiego
Keyword(s):  
Fermi Liquids ◽  
Two Dimensional

scholarly journals Atypical behavior of collective modes in two-dimensional Fermi liquids

2020 ◽  
Vol 32 (34) ◽  
pp. 345602 ◽  
Author(s):  
M P Gochan ◽  
J T Heath ◽  
K S Bedell
Keyword(s):  
Collective Modes ◽  
Fermi Liquids ◽  
Two Dimensional

ANISOTROPIC PSEUDOGAP IN THE HALF-FILLING TWO-DIMENSIONAL HUBBARD MODEL AT FINITE TEMPERATURE

2000 ◽  
Vol 14 (21) ◽  
pp. 2271-2286
Author(s):  
TAIICHIRO SAIKAWA ◽  
ALVARO FERRAZ
Keyword(s):  
Fermi Surface ◽  
Fermi Level ◽  
Hubbard Model ◽  
Spectral Function ◽  
Density Of States ◽  
Spin Fluctuation ◽  
The Self ◽  
Two Dimensional ◽  
Self Energy ◽  
Half Filling

We have studied the pseudogap formation in the single-particle spectra of the half-filling two-dimensional Hubbard model. Using a Green's function with the one-loop self-energy correction of the spin and charge fluctuations, we have numerically calculated the self-energy, the spectral function, and the density of states in the weak-coupling regime at finite temperatures. Pseudogap formations have been observed in both the density of states and the spectral function at the Fermi level. The pseudogap in the spectral function is explained by the non-Fermi-liquid-like nature of the self-energy. The anomalous behavior in the self-energy is caused by both the strong antiferromagnetic spin fluctuation and the nesting condition on the non-interacting Fermi surface. In the present approximation, we find a logarithmic singularity in the integrand of the self-energy imaginary part. The pseudogap in the spectral function is highly momentum dependent on the Fermi surface. This anisotropy of the pseudogap is produced by the flatness of the band dispersion around the saddle point rather than the nesting condition on the Fermi level.

scholarly journals On hearing the shape of an arbitrary doubly-connected region in R2

1990 ◽  
Vol 31 (4) ◽  
pp. 472-483 ◽  
Author(s):  
E. M. E. Zayed
Keyword(s):  
Asymptotic Expansion ◽  
Spectral Function ◽  
Basic Problem ◽  
Outer Boundary ◽  
Connected Region ◽  
Two Dimensional ◽  
Complete Knowledge ◽  
Impedance Condition

AbstractThe basic problem in this paper is that of determining the geometry of an arbitrary doubly-connected region in R2 together with an impedance condition on its inner boundary and another impedance condition on its outer boundary, from the complete knowledge of the eigenvalues for the two-dimensional Laplacian using the asymptotic expansion of the spectral function for small positive t.

scholarly journals Hydrodynamic and ballistic AC transport in two-dimensional Fermi liquids

2019 ◽  
Vol 99 (16) ◽  
Author(s):  
Mani Chandra ◽  
Gitansh Kataria ◽  
Deshdeep Sahdev ◽  
Ravishankar Sundararaman
Keyword(s):  
Fermi Liquids ◽  
Two Dimensional
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