التفاصيل البيبلوغرافية
| العنوان: |
Nanoscale self-organization and metastable non-thermal metallicity in Mott insulators. |
| المؤلفون: |
Ronchi, Andrea, Franceschini, Paolo, De Poli, Andrea, Homm, Pía, Fitzpatrick, Ann, Maccherozzi, Francesco, Ferrini, Gabriele, Banfi, Francesco, Dhesi, Sarnjeet S., Menghini, Mariela, Fabrizio, Michele, Locquet, Jean-Pierre, Giannetti, Claudio |
| المصدر: |
Nature Communications; 6/28/2022, Vol. 13 Issue 1, p1-14, 14p |
| مصطلحات موضوعية: |
METAL-insulator transitions, LATTICE dynamics, ELECTRON configuration, METASTABLE states, X-ray microscopy |
| مستخلص: |
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 transient 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. Mott metal-insulator transition in real materials is characterized by complex lattice and electron dynamics involving multiple length and time scales. Here, by combining time-resolved experimental probe and coarse-grained modelling, the authors elucidate the nanoscale dynamics across the Mott transition in V2O3. [ABSTRACT FROM AUTHOR] |
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