A novel quantum field approach to photoexcited insulators
Autor: | E. Klotins |
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Rok vydání: | 2016 |
Předmět: |
Physics
Low-Temperature Radiation Effects in Wide Gap Materials Physics and Astronomy (miscellaneous) Condensed matter physics 010308 nuclear & particles physics Phonon General Physics and Astronomy Electron 01 natural sciences Photoexcitation Quantum mechanics Dispersion relation Excited state 0103 physical sciences Quasiparticle Quantum field theory 010306 general physics Excitation |
Zdroj: | Low Temperature Physics. 42:570-575 |
ISSN: | 1090-6517 1063-777X |
Popis: | In order to predict optical properties of insulating materials under intensive laser excitation, we generalized methods of quantum electrodynamics, allowing us to simulate excitation of electrons and holes, interacting with each other and acoustic phonons. The prototypical model considers a two-band dielectric material characterized by the dispersion relations for electron and hole states. We developed a universal description of excited electrons, holes and acoustic phonons within joint quantum kinetics formalism. Illustrative solutions for the quasiparticle birth-annihilation operators, applicable at short laser pulses at 0 K, are obtained by the transition from the macroscopic description to the quantum field formalism. |
Databáze: | OpenAIRE |
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