Plasmon-plasmon interaction and the role of buffer in epitaxial graphene microflakes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00580713" target="_blank" >RIV/68378271:_____/23:00580713 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/23:10473330

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.108.045308" target="_blank" >https://doi.org/10.1103/PhysRevB.108.045308</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.108.045308" target="_blank" >10.1103/PhysRevB.108.045308</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Plasmon-plasmon interaction and the role of buffer in epitaxial graphene microflakes

Popis výsledku v původním jazyce

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. We explain this discrepancy by spontaneously formed graphene microflakes. We further support our conclusions by the data from confocal Raman mapping and atomic force microscopy and also using data collected on artificially created graphene nanoribbons. An unexpectedly large plasmon resonance redshift was observed in nanoribbons. This 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 agreement with experimentally reported values.

Název v anglickém jazyce

Plasmon-plasmon interaction and the role of buffer in epitaxial graphene microflakes

Popis výsledku anglicky

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. We explain this discrepancy by spontaneously formed graphene microflakes. We further support our conclusions by the data from confocal Raman mapping and atomic force microscopy and also using data collected on artificially created graphene nanoribbons. An unexpectedly large plasmon resonance redshift was observed in nanoribbons. This 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 agreement with experimentally reported values.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

108

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

045308

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85166748976