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Correlation dressed excited states of solids: Theory of time-resolved photoemission spectroscopy

Title
Correlation dressed excited states of solids: Theory of time-resolved photoemission spectroscopy
Authors
Lee, JaeDong
DGIST Authors
Lee, JaeDong
Issue Date
2019-10-24
Citation
2019 KPS Fall Meeting
Type
Conference
Abstract
A theory of the time-resolved photoemission spectroscopy (TRPES) is developed. The theory enables to explore the real-time dynamics of excited states of infinitely periodic 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 the two systems 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 clearly that NiO is like the Mott-Hubbard insulator (MHI) and CuO is like the charge transfer insulator (CTI). In the two-dimensional gapless semiconductor graphene, the real-time dynamics of quantum-phase-dressed, i.e., due to Berry phase and pseudospin correlation, excited states are investigated depending on the polarizations of pump and probe pulses through the time-resolved angle-resolved photoemission spectroscopy (TR-ARPES). In particular, the resultant dynamics of optically doped electrons and holes, that is, their development and bleaching, in the massless Dirac states are examined in the angle-resolved mode.
URI
http://hdl.handle.net/20.500.11750/14221
Publisher
한국물리학회
Related Researcher
  • Author Lee, JaeDong Light and Matter Theory Laboratory
  • Research Interests Theoretical Condensed Matter Physics; Ultrafast Dynamics and Optics; Nonequilibrium Phenomena
Files:
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Collection:
Department of Physics and ChemistryLight and Matter Theory Laboratory2. Conference Papers


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