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 ...
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...
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... Nicola,Manini,Giuseppe,... - 《Physical Review B》 被引量: 2发表: 2002年 The Mott–Hubbard insulating state and orbital degeneracy in...
d-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 structural order with a high electrical conductivity. This apparent contradiction can be resolved in...
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-...
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<...
arXiv:cond-mat/0304580v2[cond-mat.str-el]4Aug20031Finite-TemperatureMottTransitionintheTwo-DimensionalHubbardModelS.Onoda∗aandM.ImadabaTokuraSpinSupe..
2015-01-15上传 band insulator to mott insulator transition in a bilayer hubbard model 文档格式: .pdf 文档大小: 142.78K 文档页数: 4页 顶/踩数: 0/0 收藏人数: 0 评论次数: 0 文档热度: 文档分类: 论文--大学论文 文档标签: bandinsulatortomotttransitioninabilayerhubbardmodel ...
Presence of moderate intense charge transfer (CT) satellite in V 2p core level photo emission spectrum and the smaller value of crystal field splitting energy observed in XANE spectrum confirm the weaker hybridization between ligand O 2p and metal V 3d orbitals. RPES study confirms the mixing of...
The relevant 2p orbits on the ligand O sites and a d orbit free from MH splitting are taken into account with the use of the Hartree-Fock approximation. The calculated result shows that the orbit can cause the MH band occupied by about one d-hole, while it is very difficult for the ...