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: In this article, a simple theory of the metal-insulator transition is proposed based on the Hubbard model of narrow-band metals, based on which a simple model for metal insulator transition was proposed.
2 citations
TL;DR: In this paper, the authors describe quantum monte carlo simulations of the static and dynamic properties of the one dimensional boson Hubbard model, emphasizing the extent to which an external confining potential modifies the behavior.
Abstract: We describe quantum monte carlo simulations of the static and dynamic properties of the one dimensional boson Hubbard model, emphasizing the extent to which an external confining potential modifies the behavior. While the superfluid-Mott insulator quantum phase transition no longer exists when the system is confined, Mott and superfluid regions persist locally in the system. We construct a ‘state diagram’ based on the local density and compressibility profiles. Solitons present in the dynamics of the unconfined system survive the addition of a trapping potential.
2 citations
TL;DR: In this paper, the Mott transition from being bound states in the confined phase to resonances in the deconfined phase is investigated, and the consequences of this qualitative change in the hadron spectrum on final state interactions of charmonium in hot and dense matter are investigated.
Abstract: At the chiral restoration/deconfinement transition, most hadrons undergo a Mott transition from being bound states in the confined phase to resonances in the deconfined phase. We investigate the consequences of this qualitative change in the hadron spectrum on final state interactions of charmonium in hot and dense matter, and show that the Mott effect for D-mesons leads to a critical enhancement of the J/$\psi$ dissociation rate. Anomalous J/psi suppression in the NA50 experiment is discussed as well as the role of the Mott effect for the heavy flavor kinetics in future experiments at the LHC. The status of our calculations of heavy quarkonium dissociation cross sections due to quark and gluon impact is reviewed, and estimates for in-medium effects due to the lowering of the ionisation threshold are given.
2 citations
TL;DR: In this paper, the density of states through the nanostructure and the charge transport perpendicular to the planes of the planes were determined by employing dynamical mean field theory, with the barrier tuned to lie near the quantum critical point of the Mott metal-insulator transition.
Abstract: We examine devices constructed out of multilayered sandwiches of semi-infinite metal-barrier-semi-infinite metal, with the barrier tuned to lie near the quantum critical point of the Mott metal-insulator transition. By employing dynamical mean field theory, we are able to solve the many-body problem exactly (within the local approximation) and determine the density of states through the nanostructure and the charge transport perpendicular to the planes. We introduce a generalization of the Thouless energy that describes the crossover from tunneling to incoherent thermally activated transport.
2 citations
TL;DR: In this article, the optical properties of the CoV 2 ion were studied and it was shown that a broad spectrum arising from the Mott excitation of the V $d$ states and sharp peaks from the intra-atomic $d\ensuremath{-}d$ transitions in the Co ions coexist.
Abstract: We studied the optical properties of ${\mathrm{CoV}}_{2}{\mathrm{O}}_{4}$, in which a broad spectrum arising from the Mott excitation of the V $d$ states and sharp peaks from the intra-atomic $d\ensuremath{-}d$ transitions in the Co ions coexist. We found that the width of the $d\ensuremath{-}d$ transition peaks decreases and that Fano resonance appears in the steady-state optical spectrum with decreasing temperature. We also found that the width of the $d\ensuremath{-}d$ transition peaks increases less than 1 ps after a pump pulse is applied to the Mott excitation. These results indicate that the Mott excitation and the $d\ensuremath{-}d$ transitions are strongly coupled in this compound.
2 citations