Plasmon-plasmon interaction and the role of buffer in epitaxial graphene microflakes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10473330" target="_blank" >RIV/00216208:11320/23:10473330 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/23:00580713
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=VtUUyaKrO5" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=VtUUyaKrO5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.108.045308" target="_blank" >10.1103/PhysRevB.108.045308</a>
Alternative languages
Result language
angličtina
Original language name
Plasmon-plasmon interaction and the role of buffer in epitaxial graphene microflakes
Original language description
We investigate the origin of the translational symmetry breaking in epitaxially grown single-layer graphene. Despite the surface morphology of graphene films influenced by the presence of mutually parallel SiC surface terraces, the far-infrared magnetoplasmon absorption is almost independent of the angle between the probing light polarization and the orientation of terraces. Based on a detailed analysis of the plasmon absorption line shape and its behavior in the magnetic field, supported by confocal Raman mapping and atomic force microscopy, we explain this discrepancy by spontaneously formed graphene microflakes. We further support our conclusions using data collected on artificially created graphene nanoribbons: we recognize similar plasmon origin in artificial ribbons and naturally formed grains. An unexpectedly large plasmon resonance redshift was observed in nanoribbons. In a hydrogen-intercalated sample (which does not contain the buffer), this redshift is quantitatively considered by a plasmon-plasmon interaction. This redshift is due to an interplay between the plasmon-plasmon coupling and the Coulomb screening by the buffer-induced interface states in nonintercalated samples featuring a buffer layer. This model determines the density of interface states in good agreement with experimentally reported values.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/GA19-12052S" target="_blank" >GA19-12052S: Topological magnetoplasmons in epitaxial graphene for broadband far-infrared detectors</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
108
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
045308
UT code for WoS article
001382708600001
EID of the result in the Scopus database
2-s2.0-85166748976