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@ARTICLE{Senkovskiy:858679,
author = {Senkovskiy, Boris V. and Usachov, Dmitry Yu. and Fedorov,
Alexander V. and Marangoni, Tomas and Haberer, Danny and
Tresca, Cesare and Profeta, Gianni and Caciuc, Vasile and
Tsukamoto, Shigeru and Atodiresei, Nicolae and Ehlen, Niels
and Chen, Chaoyu and Avila, José and Asensio, Maria C. and
Varykhalov, Andrei Yu. and Nefedov, Alexei and Wöll,
Christof and Kim, Timur K. and Hoesch, Moritz and Fischer,
Felix R. and Grüneis, Alexander},
title = {{B}oron-{D}oped {G}raphene {N}anoribbons: {E}lectronic
{S}tructure and {R}aman {F}ingerprint},
journal = {ACS nano},
volume = {12},
number = {8},
issn = {1936-086X},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2018-07524},
pages = {7571 - 7582},
year = {2018},
abstract = {We investigate the electronic and vibrational properties of
bottom-up synthesized aligned armchair graphene nanoribbons
of N = 7 carbon atoms width periodically doped by
substitutional boron atoms (B-7AGNRs). Using angle-resolved
photoemission spectroscopy and density functional theory
calculations, we find that the dopant-derived valence and
conduction band states are notably hybridized with
electronic states of Au substrate and spread in energy. The
interaction with the substrate leaves the bands with pure
carbon character rather unperturbed. This results in an
identical effective mass of ≈0.2 m0 for the next-highest
valence band compared with pristine 7AGNRs. We probe the
phonons of B-7AGNRs by ultrahigh-vacuum (UHV) Raman
spectroscopy and reveal the existence of characteristic
splitting and red shifts in Raman modes due to the presence
of substitutional boron atoms. Comparing the Raman spectra
for three visible lasers (red, green, and blue), we find
that interaction with gold suppresses the Raman signal from
B-7AGNRs and the energy of the green laser (2.33 eV) is
closer to the resonant E22 transition. The hybridized
electronic structure of the B-7AGNR–Au interface is
expected to improve electrical characteristics of contacts
between graphene nanoribbon and Au. The Raman fingerprint
allows the easy identification of B-7AGNRs, which is
particularly useful for device fabrication.},
cin = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
ddc = {540},
cid = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
$I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)
/ Hybrid 2D-based interfaces from first principles
$(jias1e_20180501)$},
pid = {G:(DE-HGF)POF3-143 / $G:(DE-Juel1)jias1e_20180501$},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30004663},
UT = {WOS:000443525600014},
doi = {10.1021/acsnano.8b04125},
url = {https://juser.fz-juelich.de/record/858679},
}