Ultrafast Dephasing and Collective Effects in the Quantum Hall Effect Regime

Autor:	Ilias E. Perakis, Daniel S. Chemla
Rok vydání:	2002
Předmět:	Physics Condensed matter physics Dephasing Exciton Landau quantization Quantum Hall effect Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Coupling (physics) Quantum mechanics Coulomb Spectroscopy
Zdroj:	physica status solidi (b). 234:242-253
ISSN:	1521-3951 0370-1972
Popis:	Using time resolved four-wave-mixing (FWM) spectroscopy and many-body theory we investigate the role of non-instantaneous collective and correlation effects in the dynamics of the cold two dimensional electron gas (2DEG) in large magnetic fields. We find a strong non-Markovian magnetoexciton dephasing and a strong time-dependent Coulomb coupling between the Landau levels (LL), governed by the dynamics of the inter-LL magnetoplasmon (MP) excitations. Our results show that ultrafast spectroscopy is a powerful tool for studying collective and strong correlation effects on the nanoscale.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2629e4bec6d89e60642859d2fc8197fb https://doi.org/10.1002/1521-3951(200211)234:1<242::aid-pssb242>3.0.co Zobrazit plný text záznamu Plný text