Web10 feb. 2016 · Studying the ionic Hubbard model at the lowest order, we find two insulating states, one with Mott character at large U and another with single-particle gap character at large ionic potential Δ. The present approach gives a … Web21 apr. 2024 · W e studied the ionic-Hubbard model on 2 D square lattice by IPT metho d. W e calculated density of state, energy gap and self-energy a t T = 0 conditions. Our …
[2304.04563] Phase diagram of the ionic Hubbard model with …
Web22 jun. 2011 · Dynamics in the one-dimensional extended ionic Hubbard model. We investigate single-particle spectral densities and dynamical charge and spin structure … Web6 dec. 2024 · (a) Phase diagram of the 1D ionic Hubbard model as a function of U for fixed Δ and J. Δ c and Δ s are the charge and spin gaps. (b) The bond order parameter B ^ … porter\u0027s five forces tool
Exact exchange-correlation potential of an ionic Hubbard …
WebThe Mott transition, one of the core subjects in condensed matter physics, allows for the observation of intriguing phenomena, such as high-temperature superconductivity, exotic magnetism, pseudogap, and bad-metal behavior [].Although the Hubbard model is thought to include the essential physics of these phenomena, a detailed comparison of the … Web1 apr. 2024 · The ionic Hubbard model (IHM) is the simplest model in which one can extend the Hubbard model, with added a staggered on-site ionic potential Δ. In the … WebWe derive an effective Hamiltonian for the ionic Hubbard model at half filling, extended to include nearest-neighbor repulsion. Using a spin-particle transformation, the effective model is mapped onto simple spin-1 models in two particular cases. Using another spin-particle transformation, a slightly modified model is mapped into an SU(3) antiferromagnetic … op shop in abbotsford