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, the authors describe a Fermi liquid picture of high Tc superconductivity, showing that a density-of-states (dos) peak associated with the CuO2-plane van Hove singularity causes a peak in Tc as a function of hole doping.
Abstract: This review describes a Fermi liquid picture of high-Tc superconductivity. A density-of-states (dos) peak associated with the CuO2-plane van Hove singularity causes a peak in Tc as a function of hole doping. Strong correlation effects drive a Mott transition at half filling. For intermediate doping, the electronic system is unstable against phase separation, with one phase near the insulating state, the other near the Tc peak. The large dos leads to competition between superconductivity and structural instability, in analogy with the A15 compounds. The superconductivity appears to be driven by strong electron-phonon coupling, enhanced by fluctuation effects.
48 citations
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TL;DR: In this article, a simple 3D crossover expression for the resistance versus temperature behavior in highly insulating 3D films is presented, which extrapolates to the Mott variable-range hopping law at high temperatures, and at low temperatures to the Efros - Shklovskii variable range hopping law.
Abstract: Useful and simple 3D crossover expressions are presented for the resistance versus temperature behaviour in highly insulating 3D films. At high temperatures, this theory extrapolates to the Mott variable-range hopping law, and at low temperatures to the Efros - Shklovskii variable-range hopping law. Good agreement is found between the crossover theory and resistance measurements.
47 citations
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TL;DR: The transition metal chalcogenide Ni(S,Se)2 is one of the few highly correlated, Mott-Hubbard systems without a strong first-order structural distortion that normally cuts off the critical behavior at the metal-insulator transition as discussed by the authors.
Abstract: The transition metal chalcogenide Ni(S,Se)2 is one of the few highly correlated, Mott-Hubbard systems without a strong first-order structural distortion that normally cuts off the critical behavior at the metal-insulator transition The zero-temperature (T) transition was tuned with pressure, and significant deviations were found near the quantum critical point from the usual T1/2 behavior of the conductivity characteristic of electron-electron interactions in the presence of disorder The transport data for pressure and temperature below 1 kelvin could be collapsed onto a universal scaling curve
47 citations
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TL;DR: In this paper, the authors discuss Thomas-Fermi screening and Mott transition for electron shielding in heavily doped many valley semiconductors, and discuss the Mott Transition.
Abstract: Electron shielding in heavily doped many valley semiconductors, discussing Thomas-Fermi screening and Mott transition
47 citations
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TL;DR: The consequences of Kondo resonance narrowing for the Mott transition in d-band materials, particularly iron pnictides, and the narrow ESR linewidth recently observed in ferromagnetically correlated f-electron materials are discussed.
Abstract: We develop a simple scaling theory for the effect of Hund's interactions on the Kondo effect, showing how an exponential narrowing of the Kondo resonance develops in magnetic ions with large Hund's interaction. Our theory accounts for the exponential reduction of the Kondo temperature with spin S of the Hund's coupled moment, first observed in d-electron alloys in the 1960s, and more recently encountered in numerical calculations on multiband Hubbard models. We discuss the consequences of Kondo resonance narrowing for the Mott transition in d-band materials, particularly iron pnictides, and the narrow ESR linewidth recently observed in ferromagnetically correlated f-electron materials.
47 citations