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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 paper, the phase diagram for the Mott transition in the two-dimensional Hubbard model was studied using the variational cluster approximation, and Antiferromagnetic short-range correlations were found to substantially affect the competition between the metallic and the insulating states.
Abstract: The phase diagram for the Mott transition in the two-dimensional Hubbard model is studied using the variational cluster approximation. Antiferromagnetic short-range correlations are found to substantially affect the competition between the metallic and the insulating state. Opposed to dynamical mean-field theory, the transition turns out to be discontinuous even at zero temperature although a critical point at T=0 can be identified where a smooth transition takes place in a metastable phase.

1 citations

Posted Content
TL;DR: The half-filled ground state of the Hubbard model in one dimension is studied by Kondo-lattice theory as discussed by the authors, which casts doubt on the claim by E. H. Lieb and F. Y. Wu that the ground state is the Mott insulator.
Abstract: The half-filled ground state of the Hubbard model in one dimension is studied by Kondo-lattice theory. Because of the Kondo effect, any insulating ground state with a complete gap open is unstable in the presence of an infinitesimal perturbation. This fact casts doubt on the claim by E. H. Lieb and F. Y. Wu, Phys. Rev. Lett. 20, 1445 (1968) that the half-filled ground state is the Mott insulator. Though the claim is based on a rigorous result given by the Bethe-ansatz solution, the rigorous result is simply a necessary condition for the ground state being an insulator.

1 citations

Proceedings ArticleDOI
10 May 2015
TL;DR: Pump-probe spectroscopic data on K x Fe 2−y Se 2 superconductors exhibit signatures of orbital-selective Mott transition with a significant enhancement of a slow decay component alongside a decrease in oscillatory coherent-phonon signals upon raising temperature to 160 K.
Abstract: Pump-probe spectroscopic data on K x Fe 2−y Se 2 superconductors exhibit signatures of orbital-selective Mott transition with a significant enhancement of a slow decay component alongside a decrease in oscillatory coherent-phonon signals upon raising temperature to 160 K.

1 citations

Journal ArticleDOI
TL;DR: In this article, the authors review the recent progress in understanding the Mott transition in disordered systems using the mean-field approach to the strong correlation problem, based on a new functional integral formulation of the disordered interacting electron problem.
Abstract: We review the recent progress in understanding the Mott transition in disordered systems using the mean-field approach to the strong correlation problem. It is based on a new functional integral formulation of the disordered interacting electron problem. The saddle-point solution recovers a mean-field theory of the strong correlation problem, and becomes exact in the limit of large spatial coordination. We compare the results of the mean-field theory with experimental findings and indicate directions for future work.

1 citations

Book ChapterDOI
01 Jan 1992
TL;DR: In this paper, a phenomenological model was proposed for the transport properties of cuprates and organic metals, in which the velocity is strongly k-dependent and is enhanced above the band value in the vicinity of kF.
Abstract: We review some transport properties of organic metals, investigated in the 1970’s, and accounted-for by a continuous metal-to-semimetal transition. Similar properties are observed in the cuprates in the normal state. We propose a phenomenological model in which the velocity is strongly k-dependent and is enhanced above the band value in the vicinity of kF. This model accounts very well for the transport properties of cuprates and organic metals. It also accounts for the correlation found by Uemura between Tc and ΛLondon -2. We account for this phenomenological model by a screening constant at Kf which has a critical behavior as the Mott transition is approached, following the conjecture of McMillan. We suggest that this conjecture holds for highly-ordered crystals.

1 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202334
202271
202165
202064
201968
201871