scholarly journals Boson Hubbard model with weakly coupled fermions

2008 ◽  
Vol 78 (22) ◽  
Author(s):  
Roman M. Lutchyn ◽  
Sumanta Tewari ◽  
S. Das Sarma
Keyword(s):  
Hubbard Model ◽  
Weakly Coupled ◽  
Boson Hubbard Model

Equilibrium and Dynamical Properties of the Boson Hubbard Model in One Dimension

2005 ◽  
Vol 140 (3-4) ◽  
pp. 313-332 ◽  
Author(s):  
R. T. Scalettar ◽  
G. Batrouni ◽  
P.J.H. Denteneer ◽  
F. Hébert ◽  
A. Muramatsu ◽  
...  
Keyword(s):  
Hubbard Model ◽  
One Dimension ◽  
Dynamical Properties ◽  
Boson Hubbard Model

scholarly journals Emergence of quasiparticles in a doped Mott insulator

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Yao Wang ◽  
Yu He ◽  
Krzysztof Wohlfeld ◽  
Makoto Hashimoto ◽  
Edwin W. Huang ◽  
...  
Keyword(s):  
Hubbard Model ◽  
Single Layer ◽  
Mott Insulator ◽  
Spectral Weight ◽  
Particle Spectrum ◽  
Electron Hole ◽  
Strong Electron ◽  
Side Band ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Weakly Coupled

AbstractHow a Mott insulator develops into a weakly coupled metal upon doping is a central question to understanding various emergent correlated phenomena. To analyze this evolution and its connection to the high-Tc cuprates, we study the single-particle spectrum for the doped Hubbard model using cluster perturbation theory on superclusters. Starting from extremely low doping, we identify a heavily renormalized quasiparticle dispersion that immediately develops across the Fermi level, and a weakening polaronic side band at higher binding energy. The quasiparticle spectral weight roughly grows at twice the rate of doping in the low doping regime, but this rate is halved at optimal doping. In the heavily doped regime, we find both strong electron-hole asymmetry and a persistent presence of Mott spectral features. Finally, we discuss the applicability of the single-band Hubbard model to describe the evolution of nodal spectra measured by angle-resolved photoemission spectroscopy (ARPES) on the single-layer cuprate La2−xSrxCuO4 (0 ≤ x ≤ 0.15). This work benchmarks the predictive power of the Hubbard model for electronic properties of high-Tc cuprates.

scholarly journals Exact study of the one-dimensional boson Hubbard model with a superlattice potential

2006 ◽  
Vol 73 (17) ◽  
Author(s):  
V. G. Rousseau ◽  
D. P. Arovas ◽  
M. Rigol ◽  
F. Hébert ◽  
G. G. Batrouni ◽  
...  
Keyword(s):  
Hubbard Model ◽  
One Dimensional ◽  
The One ◽  
Boson Hubbard Model
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