Document Details

Document Type : Article In Journal 
Document Title :
Carrier dynamics in Landau-quantized graphene featuring strong Auger scattering
Carrier dynamics in Landau-quantized graphene featuring strong Auger scattering
 
Subject : physics 
Document Language : English 
Abstract : The energy spectrum of common two-dimensional electron gases consists of a harmonic (that is, equidistant) ladder of Landau levels, thus preventing the possibility of optically addressing individual transitions. In graphene, however, owing to its non-harmonic spectrum, individual levels can be addressed selectively. Here, we report a time-resolved experiment directly pumping discrete Landau levels in graphene. Energetically degenerate Landau-level transitions from n = -1 to n = 0 and from n = 0 to n = 1 are distinguished by applying circularly polarized THz light. An analysis based on a microscopic theory shows that the zeroth Landau level is actually depleted by strong Auger scattering, even though it is optically pumped at the same time. The surprisingly strong electron-electron interaction responsible for this effect is directly evidenced through a sign reversal of the pump-probe signal 
ISSN : 1745-2473 
Journal Name : NATURE PHYSICS 
Volume : 116 
Issue Number : 1 
Publishing Year : 1435 AH
2015 AD 
Article Type : Article 
Added Date : Tuesday, August 22, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
M Mittendorff,Mittendorff,, M InvestigatorDoctoratemhm@umd.edu
F WendlerWendler, F ResearcherDoctorate 
E. MalicMalic, E. ResearcherDoctorate 
A Knorr,Knorr,, A ResearcherDoctorate 
M OrlitaOrlita, M ResearcherDoctorate 
M PotemskiPotemski, M ResearcherDoctorate 
C BergerBerger, C ResearcherDoctorate 
W. A. de Heerde Heer, W. A ResearcherDoctorate 
H SchneiderSchneider, H ResearcherDoctorate 
M HelmHelm, M ResearcherDoctorate 

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