Grandi F, Li J, Eckstein M (2021)
Publication Type: Journal article
Publication year: 2021
Book Volume: 103
Article Number: L041110
Journal Issue: 4
DOI: 10.1103/PhysRevB.103.L041110
Nonlinear phononics holds the promise for controlling properties of quantum materials on the ultrashort timescale. Using nonequilibrium dynamical mean-field theory, we solve a model for the description of organic solids, where correlated electrons couple nonlinearly to a quantum phonon mode. Unlike previous works, we exactly diagonalize the local phonon mode within the noncrossing approximation to include the full phononic fluctuations. By exciting the local phonon in a broad range of frequencies near resonance with an ultrashort pulse, we show it is possible to induce a Mott insulator-to-metal phase transition. Conventional semiclassical and mean-field calculations, where the electron-phonon interaction decouples, underestimate the onset of the quasiparticle peak. This fact, together with the nonthermal character of the photoinduced metal, suggests a leading role of the phononic fluctuations and of the dynamic nature of the state in the vibrationally induced quasiparticle coherence.
APA:
Grandi, F., Li, J., & Eckstein, M. (2021). Ultrafast Mott transition driven by nonlinear electron-phonon interaction. Physical Review B, 103(4). https://doi.org/10.1103/PhysRevB.103.L041110
MLA:
Grandi, Francesco, Jiajun Li, and Martin Eckstein. "Ultrafast Mott transition driven by nonlinear electron-phonon interaction." Physical Review B 103.4 (2021).
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