The orbitals are assumed to be all subjected to the MH splitting. We apply Hubbard's approximation to the Coulomb interactions between electrons in same orbital states and the Hartree-Fock approximation to the Coulomb interactions between electrons in different orbitalstates. The obtained result shows...
Sensitivity of the Mott Transition to Non-cubic Splitting of the Orbital Degeneracy: Application to NH3 K3C60 Within dynamical mean-field theory, we study the metal-insulator transition of a twofold orbitally degenerate Hubbard model as a function of a splitting Δ... N Manini,GE Santoro,AD Co...
Our data show that the crystal-field splitting is too large to explain the anomalous temperature dependence of the c-axis lattice parameter by thermal occupation of excited crystal-field levels. Alternatively, we propose that a thermal population of the upper Hubbard band gives rise to the ...
We also compare the Hubbard-I bandsplitting Mott transition description with results obtained using the standard Gutzwiller Approximation (GA), and show that the two approximate approaches lead to qualitatively different results. In contrast to the GA applied to the system studied here, the Hubbard-...
thermoelectric effects in semiconductors and insulators/ Mott-Hubbard modelliquid MnTesubband splittingd-band splittingintraatomic effectA series of experiments performed in our laboratory have shown that liquid alloy systems of the form MTe (M is a transition metal other than Mn) combine salt-like ...
4d-f), as the elliptical electron pocket originates from the upper Hubbard band itself. Although our data stands in clear contrast to studies of Sr2Ir1−xRhxO4, it bears qualitative resemblance to the case of electron doping in Sr2−xLaxIrO4, where both hole and electron pockets have ...
This interaction introduces Mottness by tethering double occupancy to k-space rather than the usual real space as in the well-known Hubbard model. As we will show, this model yields physics for strong interactions consistent with the Hubbard model. The reason for this consilience72 is that both...
with the a axis perpendicular to the CuOu plane) forms the ),{H-band are exaininedby applying IIubbard's approximation te these orbits, The relevant 2P orbits on the ligandO sites and a d orbit fvee from・]v[II splitting are taken into account with the use of theHartree-Focl<...
(Fig.4e). Application of an electric field will create an energy shift between the two Mott insulator Hubbard bands. However, since both upper Hubbard bands (UHB) are fully occupied by holes, tunneling of holes between the two layers is forbidden, and this carrier configuration (nt = ...
For the Hubbard model with multiple orbitals at the magnetic ions, the orbital necessarily becomes an active degree of freedom in addition to the spin once the system is in the Mott insulating phase with localized electrons on the lattice sites7. In this case, more structures are involved in ...