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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, anomalous properties of quasi-two-dimensional electrons of BaCo 1- x Ni x S 2 which exhibit the Mott metal-insulator transition are reported.
Abstract: Physical properties of quasi two-dimensional electrons of BaCo 1- x Ni x S 2 which exhibits the Mott metal-insulator transition are reported. Various anomalous behaviors which are similar to those of high- T c Cu oxides have been found. It is suggested that these anomalies are induced in the metallic and magnetically correlated state without long range order and therefore with very strong low energy magnetic fluctuations. It remains unclear if the system exhibits a decreasing tendency of the electronic specific heat coefficient γ upon approaching the Mott insulating phase, which is one of the remarkable anomalous behaviors of high- T c oxides. Superconductivity has not been found down to 1.4 K.
21 citations
NEC1
TL;DR: In this paper, the possibility of halogen doping in solid buck-minsterfullerene (C 60 ), assuming that the face-centered cubic lattice structure is unchanged by doping, was investigated.
21 citations
21 citations
TL;DR: A nanoscale dynamical mean-field theory to deal with strong Coulomb interaction effects in physical systems that are intermediate in size between atoms and bulk materials, taking into account the tunneling into nearby electrodes.
Abstract: We develop a nanoscale dynamical mean-field theory (nano-DMFT) to deal with strong Coulomb interaction effects in physical systems that are intermediate in size between atoms and bulk materials, taking into account the tunneling into nearby electrodes. Focusing on a simplified treelike geometry, the usual DMFT loop simply stops when the finite lattice is fully covered, starting with an initial seed provided by the electronic environment at the boundary. To illustrate this nano-DMFT, we investigate the disappearance of the quasiparticle weight in a correlated nano object near the Mott transition. In contrast to thermally driven classical phase transitions, quantum effects lead to unexpected oscillations of the order parameter, related to the interference of coherent renormalized quasiparticles. This behavior also implies a spatially inhomogeneous Mott localization process at the nanoscale.
21 citations
TL;DR: In this paper, the first order metal/non-metal transition and canted antiferromagnetic ordering occur for 0.00 ≤ x ≤ 0.20 ≤ x < 0.15, similar to those in the bandwidth controlled system Ca 2- x Sr x RuO 4 (CSRO).
Abstract: We have grown single crystals of electron doping system Ca 2- x La x RuO 4 (0.00 ≤ x ≤0.20) by a floating zone method. The first order metal/non-metal transition and canted antiferromagnetic ordering occur for 0.00 < x < 0.15, similar to those in the bandwidth controlled system Ca 2- x Sr x RuO 4 (CSRO). However, comparing with CSRO, we found a rather different metallic ground state adjacent to the non-metallic ground state with canted antiferromagnetic order. Instead of short-range antiferromagnetic correlation found in CSRO (0.20 ≤ x < 0.50), the metallic ground state of the present system is characterized by strong ferromagnetic correlation.
21 citations