Topic
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: The low-field conductivity of β-rhombohedral boron follows Mott's law of variable-range hopping as mentioned in this paper, where the hopping centers are attributed to specific, partly occupied states in the band gap, evoked by structural defects.
6 citations
TL;DR: In this article, the charge response of strongly correlated metals near the Mott transition is studied in comparison with Raman scattering experiments which show non-Fermi-liquid or marginal Fermi liquid behaviors.
Abstract: On the basis of the itinerant-localized duality model the charge response of strongly correlated metals near the Mott transition is studied in comparison with Raman scattering experiments which show non-Fermi-liquid or marginal-Fermi-liquid behaviors. Such behaviors are due to incoherent contribution which is neglected in the ordinary Fermi-liquid theory.
6 citations
TL;DR: The discovery of a gradual chemical substitution of calcium by yttrium leads to the onset of strong metallic behavior in CaIrO3 will spur new researches to explore more exotic ground state, including superconductivity, in post-perovskite Mott insulators.
Abstract: We report on the study of insulator-to-metal transition in post-perovskite compound CaIrO3. It is discovered that a gradual chemical substitution of calcium by yttrium leads to the onset of strong metallic behavior in this compound. This observation is in stark contrast to BaIrO3, which preserves its Mott insulating behavior despite excess of charge carriers due to yttrium doping. Magnetic measurements reveal that both compounds tend to exhibit magnetic character irrespective of the chemical substitution of Ca or Ba. We analyze these unusual observations in light of recent researches that suggest that unlike BaIrO3, CaIrO3 does not necessarily possess j = 1/2 ground state due to structural distortion. The insulator-to-metal transition in CaIrO3 will spur new researches to explore more exotic ground state, including superconductivity, in post-perovskite Mott insulators.
6 citations
01 Jun 2013
TL;DR: In this article, the Mott effect in non-local PNJL models is calculated and the mass and width of the σ and the π meson modes are calculated with the result that the width in nonlocal models is in general reduced.
Abstract: We provide a novel calculation of the Mott effect in non-local PNJL models. We find that the "deconfinement" transition temperature in these models is lower than the Mott temperature. Furthermore, the mass and the width of the σ and the π meson modes is calculated with the result that the width in nonlocal models is in general reduced as compared to local models. Difficulties encountered while attempting to "Wick rotate" covariant models are carefully discussed.
6 citations
TL;DR: The Thouless energy concept was introduced in the 1970s as a semiclassical energy for electrons diffusing through a finite-sized conductor as discussed by the authors, and it has been quite successful in describing the properties of Josephson junctions when the barrier is a diffusive normal-state metal.
Abstract: The Thouless energy was introduced in the 1970s as a semiclassical energy for electrons diffusing through a finite-sized conductor. It turns out to be an important quantum-mechanical energy scale for many systems ranging from disordered metals to quantum chaos to quantum chromodynamics. In particular, it has been quite successful in describing the properties of Josephson junctions when the barrier is a diffusive normal-state metal. The Thouless energy concept can be generalized to insulating barriers by extracting an energy scale from the two-probe Kubo conductance of a strongly correlated electron system metallic or insulating via a generalized definition of the quantum-mechanical level spacing to many-body systems. This energy scale is known to determine the crossover from tunneling to Ohmic thermally activated transport in normal tunnel junctions. Here we use it to illustrate how the quasiclassical picture of transport in Josephson junctions is modified as the strongly correlated barrier passes through the Mott transition. Surprisingly, we find the quasiclassical form holds well beyond its putative realm of validity.
6 citations