FIG 5 - uploaded by Ze-Yi Song
Content may be subject to copyright.
(Color online) (a) Phase diagram of the isotropic case with J ± = J p = J z = U/4 in U/t-α plane. (b) The Mott transitions in both orbitals at J ± = J p = J z = U/12 and J ± = J p = J z = U/6 as a function of U/t at α = 0. Here α = t a y /t a x and t b y /t b x = 1.
Source publication
By applying dynamical mean-field theory in combination with exact
diagonalization at zero temperature to a half-filled Hubbard model with two
orbitals having distinct noninteracting densities of states, we show that an
orbital selective Mott transition (OSMT) will take place even without crystal
field splitting, differences in bandwidth and orbital...
Similar publications
Because Fermi liquids are inherently non-interacting states of matter, all electronic levels below the chemical potential are doubly occupied. Consequently, the simplest way of breaking the Fermi-liquid theory is to engineer a model in which some of those states are singly occupied, keeping time-reversal invariance intact. We show that breaking an...
By applying dynamical mean-field theory in combination with exact diagonalization at zero temperature to a half-filled Hubbard model with two orbitals having distinct noninteracting densities of states, we show that an orbital selective Mott transition (OSMT), where part of correlated itinerant electrons become localized, will take place even if th...
We study the nondegenerate one-dimensional two-orbital Hubbard model with an interorbital Coulomb interaction. By means of the density-matrix renormalization group technique, we calculate the local single-particle density of states and the optical conductivity at zero temperature. We find that a finite interorbital Coulomb repulsion V generates a d...
The interplay between thermal and quantum fluctuations controls the competition between phases of matter in strongly correlated electron systems. We study finite-temperature properties of the strongly coupled two-dimensional doped Hubbard model using the minimally entangled typical thermal states method on width-four cylinders. We discover that a p...
The long-standing issue of the competition between the magnetic field and the Kondo effect, favoring, respectively, triplet and singlet ground states, is addressed using a cluster slave-rotor mean-field theory for the Hubbard model and its spin-correlated, spin-frustrated extensions in two dimensions. The metamagnetic jump is established and compar...
