In this article we review essential natures of superconductivity in strongly correlated electron
systems (SCES) from a universal point of view. First we summarize experimental results on …

This review explains the relationship between density functional theory and strongly
correlated models using the simplest possible example, the two-site Hubbard model. The …

As the number of legs n of an n-leg, t− J ladder increases, density-matrix renormalization
group calculations have shown that the doped state tends to be characterized by a static …

A systematic study is made of the tJ model as a working model for copper oxide high-T c
superconductors. The main focus is on the near-half-filling region (low hole concentrations) …

On the basis of quantum Monte Carlo simulations of the two-dimensional Hubbard model
which cover the do** range from the underdoped to the overdoped regime, we find that …

We consider a two-dimensional Fermi-liquid coupled to low-energy commensurate spin
fluctuations. At small coupling, the hole Fermi surface is large and centered around Q=(π, π) …

The Hubbard model plays a special role in condensed matter theory as it is considered to be
the simplest Hamiltonian model one can write in order to describe anomalous physical …

The Hall coefficient is related to the effective carrier density and Fermi surface topology in
non-interacting and weakly interacting systems. In strongly correlated systems, the relation …

To clarify the effects of next-nearest-neighbor electron hop** t′ on the spin, charge, and
pairing correlations, we studied the two-dimensional t− t′− U Hubbard model using the …

В течение уже тридцати с лишним лет основной моделью в теории металлических
магнетиков является модель Хаббарда [1]. Она была предложена первоначально для …