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 paper, the Mott - Hubbard metal insulator transition in the half-filled mass imbalanced ionic Hubbard model is investigated using the two-site dynamical mean field theory.
Abstract: The Mott - Hubbard metal - insulator transition in the half-filled mass imbalanced ionic Hubbard model is investigated using the two-site dynamical mean field theory. We find that for a fixed mass imbalanced parameter r the critical interaction Uc increases when the ionic energy \\(\\Delta\\) is increased. In the other hand, for a fixed \\(\\Delta\\), \\(U_c\\) decreases with increasing the mass imbalance. We also show the existence of BI phase in the system for the case \\(\\Delta \
e 0\\), \\(U=0\\) and calculate the staggered charge density \\(n_B − n_A\\) as a function of the interaction for different values of the mass imbalance. Our results in the limiting cases (\\(r = 1\\); \\(\\Delta \
e 0\\) or/and \\(\\Delta = 0\\); \\(r\
e 1\\)) are in good agreement with those obtained from full dynamical mean field theory.
2 citations
TL;DR: In this paper, a spin singlet Mott state for arbitrary spin S bosons on a lattice, with particle number per cite n=S/l+1, where l is a positive integer.
Abstract: We study properties of a class of spin singlet Mott states for arbitrary spin S bosons on a lattice, with particle number per cite n=S/l+1, where l is a positive integer. We show that such a singlet Mott state can be mapped to a bosonic Laughlin wave function on the sphere with a finite number of particles at filling {
u}=1/2l. Spin, particle and hole excitations in the Mott state are discussed, among which the hole excitation can be mapped to the quasi-hole of the bosonic Laughlin wave function. We show that this singlet Mott state can be realized in a cold atom system on optical lattice, and can be identified using Bragg spectroscopy and Stern-Gerlach techniques. This class of singlet Mott states may be generalized to simulate bosonic Laughlin states with filling {
u}=q/2l.
2 citations
01 Jan 1995
TL;DR: In this paper, the Mott transition in the limit of large dimensions is studied systematically in the context of large-scale 3D models. And they describe recent results and new insights in this field.
Abstract: The Mott transition phenomena can be studied systematically in the limit of large dimensions. We describe recent results and new insights in this field.
2 citations
TL;DR: In this paper, an infinite-dimensional two-orbital Hubbard model with different bandwidths was investigated by means of the self-energy functional approach, by calculating the quasi-particle weight and the entropy at finite temperatures.
2 citations
01 Feb 2016
TL;DR: In this paper, thin polycrystalline Pr0.6Sr0.4MnO3 films were grown on the Y stabilized zirconium oxide substrates by magnetron sputtering using RF power and off-axis sputtering scheme with double cathodes.
Abstract: Thin polycrystalline Pr0.6Sr0.4MnO3 films were grown on the Y stabilized zirconium oxide substrates by magnetron sputtering using RF power and off-axis sputtering scheme with double cathodes. Only one polycrystalline phase with structural parameters consistent with that for the corresponding bulk sample was revealed in the films. Electric resistivity dependence on temperature demonstrates the shape characteristic for the substances with the Mott transition. The difference between magnetization temperature curves measured in the zero field cooling and field cooling modes was revealed. Magnetization field dependences were presented by the hysteresis loops changing their form with temperature.
2 citations