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arXiv · 1812.05894

Photoinduced enhancement of bond-order in the one-dimensional extended Hubbard model

Can Shao·Hantao Lu·Hong-Gang Luo·Rubem Mondaini
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Abstract

We investigate the real-time dynamics of the half-filled one-dimensional extended Hubbard model in the strong-coupling regime, when driven by a transient laser pulse. Starting from a wide regime displaying a charge-density wave in equilibrium, a robust photoinduced in-gap state appears in the optical conductivity, depending on the parameters of the pulse. Here, by tuning its conditions, we maximize the overlap of the time-evolving wavefunction with excited states displaying the elusive bond-ordered wave of this model. Finally, we make a clear connection between the emergence of this order and the formation of the aforementioned in-gap state, suggesting the potential observation of purely electronic (i.e., not associated with a Peierls instability) bond-ordered waves in experiments involving molecular crystals.

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Can Shao, Hantao Lu, Hong-Gang Luo, Rubem Mondaini. 2019-07-26. Photoinduced enhancement of bond-order in the one-dimensional extended Hubbard model. https://doi.org/10.1103/physrevb.100.041114

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