Journal
NPJ QUANTUM MATERIALS
Volume 6, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41535-021-00377-8
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Funding
- Royal Society via a University Research Fellowship
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [759063]
- EPSRC [EP/P020194/1, EP/T022213/1]
- Royal Society [RGS/R1/211053]
- Engineering and Physical Sciences Research Council (EPSRC) [EP/L015854/1]
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This study investigates the attosecond charge dynamics of electrons induced by strong-field laser pulses in two-dimensional Mott insulators using a combination of numerical methods. By going beyond single-particle approaches and contrasting with one-dimensional analogues, the study provides insights into high-harmonic emission and photo-induced breakdown in these systems. The analysis also reveals the time and ultra-high-frequency domains of emission, enhancing understanding of photo-melting in two-dimensional Mott insulators.
With a combination of numerical methods, including quantum Monte Carlo, exact diagonalization, and a simplified dynamical mean-field model, we consider the attosecond charge dynamics of electrons induced by strong-field laser pulses in two-dimensional Mott insulators. The necessity to go beyond single-particle approaches in these strongly correlated systems has made the simulation of two-dimensional extended materials challenging, and we contrast their resulting high-harmonic emission with more widely studied one-dimensional analogues. As well as considering the photo-induced breakdown of the Mott insulating state and magnetic order, we also resolve the time and ultra-high-frequency domains of emission, which are used to characterize both the photo-transition, and the sub-cycle structure of the electron dynamics. This extends simulation capabilities and understanding of the photo-melting of these Mott insulators in two dimensions, at the frontier of attosecond non-equilibrium science of correlated materials.
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