metal-insulator transitionsuperconducting transitions/ Mott transitionsuperconductivitytwo-band Hubbard modelinfinite dimensionselectronic statesexact diagonalization methodhalf-filledon-site repulsive interactionElectronic states in the two-band Hubbard model with infinite dimensions are investigated by using the ...
Mott insulatorvariational Monte Carlo methodionic-Hubbard modelMotivated by superconductivity (SC) in layered nitrides, we study an ionic-Hubbard model on a honeycomb lattice, which consists of two sublattices with an energy-level offset, by using an optimization variational Monte Carlo method. ...
但是两个电子占据同一个格点会感受到巨大的Coulomb排斥,因此Mott认为系统的能带会劈裂成两个:下能带由占据空格点的电子形成,(即下Hubbard能带)而上能带则由已被一个电子占据的格点上再占据一个电子所形成(上Hubbard能带).当每个格点平均有一个电子时,下能带会被填满,系统是绝缘体.我们一般把这类Mott 所讨论的由...
For the large U case the ground state of the undoped (x = 0) Hubbard model system is a Mott insulator, sometimes called a Mott-Hubbard insulator. In the cuprates almost all of the Cu ions are in the 3d9 state, and there is one hole on each site of the system. There exists a la...
Chiral mott insulator with staggered loop currents in the fully frustrated Bose-Hubbard model. Phys. Rev. B 87, 174501 (2013).A. Dhar, T. Mishra, M. Maji, R. Pai, S. Mukerjee and A. Paramekanti: "Chiral Mott insulator with staggered loop currents in the fully frustrated Bose-Hubbard...
The Hubbard model accounts for many of the diverse phenomena observed in solid-state materials, despite incorporating only nearest-neighbour hopping and on-site interactions for correlated electrons. One interesting extension to the model involves enlarg
We support this novel approach by presenting a first successful Hubbard-I type calculation for the description of the metal-insulator paramagnetic Mott transition in a strongly correlated electron system with conserved double occupancies, which is a constrained Hubbard Hamiltonian equivalent to the ...
Nonthermal Antiferromagnetic Order and Nonequilibrium Criticality in the Hubbard Model. Phys. Rev. Lett. 110, 136404 (2013). 27. Mentink, J. H. & Eckstein, M. Ultrafast Quenching of the Exchange Interaction in a Mott Insulator. Phys. Rev. Lett. 113, 057201 (2014). 28. Mentink, J. H....
a r X i v : c o n d - m a t / 0 7 0 3 7 2 8 v 1 [ c o n d - m a t . s t r - e l ] 2 7 M a r 2 0 0 7 Band insulator to Mott insulator transition in a bilayer Hubbard model S. S. Kancharla and S. Okamoto Materials Science and Technology Division, Oa...
Bose-Hubbard模型和它的超冷原子实验实现 在前面几节中,我们已经讨论了弱相互作用玻色子系统中超流态的Bogoliubov理论,在这一节我们讨论这里提到的Mott 绝缘态以及相关的量子相变.回忆我们的基本模型哈密顿量, \begin{equation} \hat{H}=\int d^{d}x\hat{\psi}^{\dag}(x)\left[-\frac{\nabla^{2}}{2m...