Effects of Long-Range Correlations on Nonmagnetic Mott Transitions in Hubbard model on Square Lattice

@article{Miyagawa2011EffectsOL,
  title={Effects of Long-Range Correlations on Nonmagnetic Mott Transitions in Hubbard model on Square Lattice},
  author={T. Miyagawa and Hisatoshi Yokoyama},
  journal={arXiv: Strongly Correlated Electrons},
  year={2011}
}
The mechanism of Mott transition in the Hubbard model on the square lattice is studied without explicit introduction of magnetic and superconducting correlations, using a variational Monte Carlo method. In the trial wave functions, we consider various types of binding factors between a doubly-occupied site (doublon, D) and an empty site (holon, H), like a long-range type as well as a conventional nearest-neighbor type, and add independent long-range D-D (H-H) factors. It is found that a wide… Expand
11 Citations
Effect of Doublon-Holon Binding on Mott Transition—Variational Monte Carlo Study of Two-Dimensional Bose Hubbard Models
To understand the mechanism of Mott transitions in the case of no magnetic influence, superfluid–insulator (Mott) transitions in the S = 0 Bose Hubbard model at unit filling are studied on square andExpand
Crossover between BCS Superconductor and Doped Mott Insulator of d-wave Pairing State in Two-Dimensional Hubbard Model
With high-Tc cuprates in mind, properties of correlated dx2-y2-wave superconducting (SC) and antiferromagnetic (AF) states are studied for the Hubbard (t-t'-U) model on square lattices, using aExpand
Assessing the orbital selective Mott transition with variational wave functions.
TLDR
It is demonstrated that the non-magnetic phase diagram is only slightly modified from infinite to two spatial dimensions, similarly to what has been considered in the limit of infinite dimensions by dynamical mean-field theory. Expand
Variational Monte Carlo Study of Spin-Gapped Normal State and BCS–BEC Crossover in Two-Dimensional Attractive Hubbard Model
We study the properties of normal, superconducting (SC), and CDW states for an attractive Hubbard model on the square lattice, using a variational Monte Carlo method. In trial wave functions, weExpand
Dynamical Characteristics of the Mott Transition: Examination of Doublon Dynamics in a Triangular-lattice Hubbard Model☆
Abstract Dynamics in a triangular-lattice Hubbard model is studied at half filling on the basis of the cluster dynamical mean field theory. Numerical calculations use a solver of the continuous-timeExpand
Charge dynamics of the antiferromagnetically ordered Mott insulator
We introduce a slave-fermion formulation in which to study the charge dynamics of the half-filled Hubbard model on the square lattice. In this description, the charge degrees of freedom areExpand
Staggered Flux State in Two-Dimensional Hubbard Models
The stability and other properties of a staggered flux (SF) state or a correlated d-density wave state are studied for the Hubbard (t–t′–U) model on extended square lattices, as a low-lying stateExpand
Variational cluster approach to the Hubbard model on a honeycomb lattice
We study the ground-state properties of the Hubbard model on the honeycomb lattice at half filling. Using the variational cluster approximation, We study the semimetal-insulator transition andExpand
Drude and Superconducting Weights and Mott Transitions in Variation Theory
Drude weight ($D$) is a useful measure to distinguish a metal from an insulator. However, $D$ has not been justifiably estimated by the variation theory for long, since Millis and Coppersmith [Phys.Expand
Correlated Band Structure of a Transition Metal Oxide ZnO Obtained from a Many-Body Wave Function Theory.
TLDR
The first application of the biorthogonal transcorrelated (BITC) method is reported: self-consistent, free from adjustable parameters, and systematically improvable many-body wave function theory, to solid-state calculations with d electrons: wurtzite ZnO. Expand
...
1
2
...

References

SHOWING 1-10 OF 51 REFERENCES
Effect of Doublon-Holon Binding on Mott Transition—Variational Monte Carlo Study of Two-Dimensional Bose Hubbard Models
To understand the mechanism of Mott transitions in the case of no magnetic influence, superfluid–insulator (Mott) transitions in the S = 0 Bose Hubbard model at unit filling are studied on square andExpand
Superconductivity and a Mott Transition in a Hubbard Model on an Anisotropic Triangular Lattice
A half-filled-band Hubbard model on an anisotropic triangular lattice ( t in two bond directions and t ' in the other) is studied using an optimization variational Monte Carlo method, to consider aExpand
Mott Transitions and d-Wave Superconductivity in Half-Filled-Band Hubbard Model on Square Lattice with Geometric Frustration(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
Mechanisms of Mott transitions and d x 2 - y 2 -wave superconductivity (SC) are studied in the half-filled-band Hubbard model on square lattices with a diagonal hopping term ( t '), using anExpand
Monte Carlo study of the two-dimensional Bose-Hubbard model
One of the most promising applications of ultracold gases in optical lattices is the possibility to use them as quantum emulators of more complex condensed matter systems. We provide benchmarkExpand
Variational Monte Carlo Studies of Attractive Hubbard Model. I Normal-State Properties
Normal states of the attractive Hubbard model, mainly in two dimensions, are studied in the context of a transition froma Ferm i liquid to an insulating or gapped state. A series of variational MonteExpand
Crossover of superconducting properties and kinetic-energy gain in two-dimensional Hubbard model
Superconductivity in the Hubbard model on a square lattice near half filling is studied using an optimization (or correlated) variational Monte Carlo method. Second-order processes of aExpand
Variational description of Mott insulators.
The Gutzwiller wave function for a strongly correlated model can, if supplemented with a long-range Jastrow factor, provide a proper variational description of Mott insulators, so far unavailable. WeExpand
GENERALIZED GUTZWILLER ANSATZ FOR THE HALF-FILLED HUBBARD CHAIN
The well-known Gutzwiller wave function is generalized by including new variational parameters to control nearest-neighbour charge-charge, charge-spin, and spin-spin correlations. The non-magneticExpand
Variational Monte-Carlo Studies of Hubbard Model. III. Intersite Correlation Effects
New variational wave functions are introduced to describe the Hubbard model in strong correlation. Intersite correlation (or Jastrow) factors are taken into account beyond the Gutzwiller waveExpand
Phase diagram and thermodynamics of the three-dimensional Bose-Hubbard model
We report results of quantum Monte Carlo simulations of the Bose-Hubbard model in three dimensions. Critical parameters for the superfluid-to-Mott-insulator transition are determined withExpand
...
1
2
3
4
5
...