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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Abstract: The phase diagrams of 3$d$ metal oxides provide rich landscapes to explore the non-equilibrium degrees of freedoms during an insulator-to-metal transition (IMT). In these materials, the dynamics of nano-textured insulating and metallic phases is characterized by an unexplored complexity than enables manipulation of phase separation to control the properties of quantum materials on ultrafast timescales. Here, we combine X-ray photoemission electron microscopy and non-equilibrium optical spectroscopy to link the temporal and spatial dynamics of the IMT in the Mott insulator V$_2$O$_3$. We show that metallic droplets, which form at the boundaries of striped insulating domains, act as seeds for the non-equilibrium expansion of the metallic phase triggered by the photo-induced change in the 3$d$-orbital occupation. We demonstrate that the growth of the metallic phase can be controlled by properly tailoring the light-excitation protocol. Our results unveil the coupled electronic and structural dynamics during an ultrafast IMT and open up the possibility of controlling the ultrafast dynamics of Mott transitions in a way that is inaccessible by thermal means.
3 citations
TL;DR: In this article , two helical isomers of polyacetylene were considered in the framework of density functional theory from the point of view of spontaneous symmetry breaking, and it was shown that the preference for one or another type of transition may depend on more subtle factors (in this case, on the rotation angle), which opens up the possibility of a fine tuning the properties of 1D nanosystems.
3 citations
Journal Article•
3 citations
TL;DR: In this paper, the cathodoluminescence spectra of the high density electron-hole system in GaP were discussed as a function of the excitation level and temperature.
3 citations
TL;DR: In this article, a generalized Hubbard model with orbital degrees of freedom was introduced, where the atomic limit is non-degenerate and the Mott insulating state is a zero-entropy state.
3 citations