Mott transitions in real materials are first order and almost always associated with lattice distortions, both features promoting the emergence of nanotextured phases. This nanoscale self-organization creates spatially inhomogeneous regions, which can host and protect tran- sient non-thermal electronic and lattice states triggered by light excitation. Here, we combine time-resolved X-ray microscopy with a Landau-Ginzburg functional approach for calculating the strain and electronic real-space configurations. We investigate V2O3, the archetypal Mott insulator in which nanoscale self-organization already exists in the low-temperature monoclinic phase and strongly affects the transition towards the high-temperature corundum metallic phase. Our joint experimental-theoretical approach uncovers a remarkable out-of- equilibrium phenomenon: the photo-induced stabilisation of the long sought monoclinic metal phase, which is absent at equilibrium and in homogeneous materials, but emerges as a metastable state solely when light excitation is combined with the underlying nanotexture of the monoclinic lattice.

Ronchi, A., Franceschini, P., De Poli, A., Homm, P., Fitzpatrick, A., Maccherozzi, F., Ferrini, G., Banfi, F., Dhesi, S. S., Menghini, M., Fabrizio, M., Locquet, J., Giannetti, C., Nanoscale self-organization and metastable non-thermal metallicity in Mott insulators, <<NATURE COMMUNICATIONS>>, 2022; (13): N/A-N/A. [doi:10.1038/s41467-022-31298-0] [http://hdl.handle.net/10807/208360]

Nanoscale self-organization and metastable non-thermal metallicity in Mott insulators

Ronchi, Andrea
Primo
;
Franceschini, Paolo;Ferrini, Gabriele;Giannetti, Claudio
Ultimo
2022

Abstract

Mott transitions in real materials are first order and almost always associated with lattice distortions, both features promoting the emergence of nanotextured phases. This nanoscale self-organization creates spatially inhomogeneous regions, which can host and protect tran- sient non-thermal electronic and lattice states triggered by light excitation. Here, we combine time-resolved X-ray microscopy with a Landau-Ginzburg functional approach for calculating the strain and electronic real-space configurations. We investigate V2O3, the archetypal Mott insulator in which nanoscale self-organization already exists in the low-temperature monoclinic phase and strongly affects the transition towards the high-temperature corundum metallic phase. Our joint experimental-theoretical approach uncovers a remarkable out-of- equilibrium phenomenon: the photo-induced stabilisation of the long sought monoclinic metal phase, which is absent at equilibrium and in homogeneous materials, but emerges as a metastable state solely when light excitation is combined with the underlying nanotexture of the monoclinic lattice.
Inglese
Ronchi, A., Franceschini, P., De Poli, A., Homm, P., Fitzpatrick, A., Maccherozzi, F., Ferrini, G., Banfi, F., Dhesi, S. S., Menghini, M., Fabrizio, M., Locquet, J., Giannetti, C., Nanoscale self-organization and metastable non-thermal metallicity in Mott insulators, <<NATURE COMMUNICATIONS>>, 2022; (13): N/A-N/A. [doi:10.1038/s41467-022-31298-0] [http://hdl.handle.net/10807/208360]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10807/208360
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