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Time-resolved photoemission of infinitely periodic atomic arrangements: correlation-dressed excited states of solids

Title
Time-resolved photoemission of infinitely periodic atomic arrangements: correlation-dressed excited states of solids
Authors
Kim, YoungjaeLee, JaeDong
DGIST Authors
Kim, Youngjae; Lee, JaeDong
Issue Date
2020-08
Citation
npj Computational Materials, 6(1), 132
Type
Article
Article Type
Article
Keywords
ELECTRONIC-STRUCTUREDENSITY-WAVEGRAPHENE
ISSN
2057-3960
Abstract
A theory of the time-resolved photoemission spectroscopy (TRPES) is developed, which enables to explore the real-time electron dynamics of infinitely periodic crystalline solids. In the strongly correlated electron systems NiO and CuO, the early-stage dynamics of the valence band edge are found to be sharply contrasted between those in the spectra of TRPES. This provides a new dynamical insight to the Zaanen–Sawatzky–Allen (ZSA) classification scheme of correlated insulators and makes us assert that NiO dynamically behaves like the Mott–Hubbard insulator (MHI) and CuO like the charge transfer insulator (CTI). In the two-dimensional carbon layer graphene, the real-time electron dynamics of quantum-phase-dressed excited states, i.e., due to the Berry phase and the pseudospin correlation, are investigated in an unprecedented way through the time-resolved angle-resolved photoemission spectroscopy (TR-ARPES). In particular, the dephasing dynamics of optically doped electrons and holes in the massless Dirac band, accompanying a field-induced gliding of the Dirac cone, are discovered. © 2020, The Author(s).
URI
http://hdl.handle.net/20.500.11750/12632
DOI
10.1038/s41524-020-00398-0
Publisher
Nature Publishing Group
Related Researcher
  • Author Lee, JaeDong Light and Matter Theory Laboratory
  • Research Interests Theoretical Condensed Matter Physics; Ultrafast Dynamics and Optics; Nonequilibrium Phenomena
Files:
Collection:
Department of Emerging Materials ScienceLight and Matter Theory Laboratory1. Journal Articles


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