High Harmonic Generation in a Correlated Electron System
| Autor: | Atsushi Ono, Shohei Imai, Sumio Ishihara |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Strongly Correlated Electrons (cond-mat.str-el) FOS: Physical sciences General Physics and Astronomy Fermion Electron 01 natural sciences Molecular physics Condensed Matter - Strongly Correlated Electrons Amplitude Electric field Lattice (order) 0103 physical sciences Physics::Atomic and Molecular Clusters High harmonic generation 010306 general physics Recombination Quantum tunnelling Optics (physics.optics) Physics - Optics |
| Zdroj: | Physical Review Letters. 124 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.124.157404 |
| Popis: | High-harmonic generation (HHG) in crystalline solids have been examined so far on the basis of one-body energy-band structures arising from electron itineracy in a periodic potential. Here, we show emergence of HHG signals which are attributed to dynamics of many-body states in a low-dimensional correlated electron system. An interacting fermion model and its effective pseudo-spin model on a one-dimensional dimer-type lattice are analyzed. Observed HHG signals in a spontaneously symmetry-broken state, where charge densities are polarized inside of dimer units, show threshold behavior with respect to light amplitude and are interpreted in terms of tunneling and recombination of kink-antikink excitations in an electric field. 8 pages, 9 figures (including supplemental material) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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