Carrier dynamics in Landau-quantized graphene featuring strong Auger scattering
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10314522" target="_blank" >RIV/00216208:11320/15:10314522 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1038/NPHYS3164" target="_blank" >http://dx.doi.org/10.1038/NPHYS3164</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/NPHYS3164" target="_blank" >10.1038/NPHYS3164</a>
Alternative languages
Result language
angličtina
Original language name
Carrier dynamics in Landau-quantized graphene featuring strong Auger scattering
Original language description
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 = 1are 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.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature Physics
ISSN
1745-2473
e-ISSN
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Volume of the periodical
11
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
75-81
UT code for WoS article
000346831100027
EID of the result in the Scopus database
2-s2.0-84927131614