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Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
(American Physical Society, 2013-07)
The competition between on-site Coulomb repulsion and Rashba spin-orbit coupling (RSOC) is studied on two-leg ladders by numerical techniques. By studying persistent currents in closed rings by exact diagonalization, it ...
Ferromagnetic fluctuations in the Rashba-Hubbard model
(American Physical Society, 2020-05)
We study the occurrence and the origin of ferromagnetic fluctuations in the longitudinal spin susceptibility of the t-t′-Rashba-Hubbard model on the square lattice. The combined effect of the second-neighbor hopping t′ and ...
Extended Hubbard model: Charge ordering and Wigner-Mott transition
(American Physical Society, 2010-10)
Strong correlations effects, which are often associated to the approach to a Mott insulating state, in some cases may be observed even far from half filling. This typically happens whenever the intersite Coulomb repulsion ...
Bose-Hubbard model in a ring-shaped optical lattice with high filling factors
(American Physical Society, 2011-07)
The high-barrier quantum tunneling regime of a Bose-Einstein condensate confined in a ring-shaped optical lattice is investigated. By means of a change of basis transformation, connecting the set of "vortex" Bloch states ...
Prethermalization and glassiness in the bosonic Hubbard model
(American Physical Society, 2015-06)
We investigate the nonequilibrium dynamics of the bosonic Hubbard model starting from inhomogeneous superfluid or Mott insulator initial states using the truncated Wigner approximation (TWA). We find that the relaxation ...
Comparison of standard DFT and Hubbard-DFT methods in structural and electronic properties of TiO 2 polymorphs and H-titanate ultrathin sheets for DSSC application
(Elsevier Science, 2018-01-15)
The structural and electronic properties of several TiO 2 polymorphs and hydrogen titanate surfaces are modeled and studied by density functional theory (DFT). By implementing the Hubbard parameter “U” in our calculations ...
Metal-insulator transitions in the periodic Anderson model
(American Physical Society, 2007-12)
We solve the periodic Anderson model in the Mott-Hubbard regime, using dynamical mean field theory. Upon electron doping of the Mott insulator, a metal-insulator transition occurs which is qualitatively similar to that of ...
Disordered Mott-Hubbard Physics in Nanoparticle Solids: Transitions Driven by Disorder, Interactions, and Their Interplay
(American Chemical Society, 2020-11)
We show that adapting the knowledge developed for the disordered Mott-Hubbard model to Nanoparticle (NP) solids can deliver many very helpful new insights. We developed a ?Hierarchical Nanoparticle Transport Simulator? ...
Mean-field phase diagram of the extended Bose-Hubbard model of many-body cavity quantum electrodynamics
(American Physical Society, 2019-04-30)
We investigate the mean-field phase diagram of the Bose-Hubbard model with infinite-range interactions in two dimensions. This model describes ultracold bosonic atoms confined by a twodimensional optical lattice and ...
Magnetic phase diagram of the infinite- U Hubbard model with nearest- and next-nearest-neighbor hoppings
(American Physical Society, 2019-05)
We study the infinite-U Hubbard model on ladders of two, four, and six legs with nearest- (t) and next-nearest- (t′) neighbor hoppings by means of the density-matrix renormalization group algorithm. In particular, we analyze ...