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Mott transition
About: Mott transition is a research topic. Over the lifetime, 2444 publications have been published within this topic receiving 78401 citations.
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TL;DR: In this article, the available data on magnetic susceptibility χ are discussed as those of a correlated Fermi liquid, a picture which may account for transport properties as well, suggesting that, for small oxygen deficiency, the La 2 CuO 4−y system has a thermal Mott transition at a temperature T M ≈ 200-300 K.
Abstract: The available data on magnetic susceptibility χ are discussed as those of a correlated Fermi liquid, a picture which may account for transport properties as well. We suggest that, for small oxygen deficiency, the La 2 CuO 4−y system has a thermal Mott transition at a temperature T M ≈ 200–300 K. Below T M , the Fermi liquid should display metamagnetic tendency, with a susceptibility increasing quadratically with T - consistently with experimental findings. From this temperature dependence, a correlation parameter is extracted: u ≈ 0.8, indicating thaat this system is as close to localization as, e.g., liquid 3 He (F a o ≅ − 0.75 and Wilson ratio about1/4 of ideal gas value).
1 citations
TL;DR: Using the dynamical mean field theory, the authors showed that an electron-phonon interaction can revert the energetic balance between the metallic state and the Mott insulator in the density-driven metal-insulator transition at zero temperature.
10 Apr 2008
TL;DR: In this paper, the random phase approximation (RPA) is used to reduce the electron-electron interaction in superconductors, and the screening of a test charge using quantum Monte Carlo is calculated.
Abstract: For conventional superconductors the electron-electron interaction is strongly reduced by retardation effects, making the formation of Cooper pairs possible. In the alkali-doped Fullerides, however, there are no strong retardation effects. But dielectric screening can reduce the electron-electron interaction sufficiently, if we assume that the random-phase approximation (RPA) is valid. It is not clear, however, if this assumption holds, since the alkali-doped Fullerides are strongly correlated systems close to a Mott transition. To test the validity of the RPA for these systems we have calculated the screening of a test charge using quantum Monte Carlo.
TL;DR: In this article, the exact Dyson equation for a transition orbital with strong interactions, coupled with an arbitrary number of ligands, is evaluated with a phenomenological interpolation formula that combines microscopic input from the high and low energy sectors.
15 Jun 2008
TL;DR: In this article, the direct quantum path integral Monte Carlo method was used to study two-dimensional electron-hole plasmas in the wide region of temperature, density and electron to hole mass ratio.
Abstract: This paper studies two-dimensional electron-hole plasmas using the direct quantum path integral Monte Carlo method. Results are presented for 2D electron-hole plasmas in the wide region of temperature, density and electron to hole mass ratio. The calculations include region of appearance and decay of the bound state (excitons and biexcitons), Mott transition from neutral e-h plasma to metallic-like clusters, formation from clusters the hexatic-like liquid and then formation of the crystal-like lattice and at very low temperatures transition of this 'lattice' to antiferromagnetic structure.