Large Variations of the Raman Signal in the Spectra of Twisted Bilayer Graphene on a BN Substrate

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F12%3A00384496" target="_blank" >RIV/61388955:_____/12:00384496 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1021/jz300176a" target="_blank" >http://dx.doi.org/10.1021/jz300176a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jz300176a" target="_blank" >10.1021/jz300176a</a>

Result language

angličtina

Original language name

Large Variations of the Raman Signal in the Spectra of Twisted Bilayer Graphene on a BN Substrate

Original language description

We report an unusual enhancement of the Raman signal of the G mode in a twisted graphene bilayer (2-LG) on a hexagonal single-crystalline boron nitride substrate. We used an isotopically engineered 2-LG, where the top layer was composed of C-13 atoms andthe bottom layer of C-12 atoms. Consequently, it was possible by Raman spectroscopy to distinguish between the enhancement coming from the top and bottom layers. The enhancement of the G mode was, however, found to be similar for the top and bottom layers, and this enhancement effect was observed only at certain locations on the substrate. The experiment with two different laser excitation energies showed that the location of the enhanced spots is dependent on the laser excitation energy. Therefore ourresults suggest that the enhancement comes from new states in the electronic structure, which are a consequence of a local specific rotation of the grains in graphene layers.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CG - Electrochemistry

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2012

Confidentiality

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

Name of the periodical

Journal of Physical Chemistry Letters

ISSN

1948-7185

e-ISSN

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Volume of the periodical

3

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

4

Pages from-to

796-799

UT code for WoS article

000301629000023

EID of the result in the Scopus database

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