Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultrafast Transient Absorption Spectroscopy of the Charge-Transfer
  Insulator NiO: Beyond the Dynamical Franz-Keldysh Effect   We demonstrate that a dynamical modification of the Hubbard U in the model
charge-transfer insulator NiO can be observed with state-of-the-art
time-resolved absorption spectroscopy. Using a self-consistent time-dependent
density functional theory plus U computational framework, we show that the
dynamical modulation of screening and Hubbard U significantly changes the
transient optical spectroscopy. Whereas we find the well-known dynamical
Franz-Keldysh effect when the U is frozen, we observe a dynamical band-gap
renormalization for dynamical U. The renormalization of the optical gap is
found to be smaller than the renormalization of U. This work opens up the
possibility of driving a light-induced transition from a charge-transfer into a
Mott insulator phase.

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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: physics
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The categories of this paper are: nlin