Universität zu Köln

Senkovskiy, B.V., Usachov, D.Y., Fedorov, A.V., Marangoni, T., Haberer, D., Tresca, C., Profeta, G., Caciuc, V., Tsukamoto, S., Atodiresei, N., Ehlen, N., Chen, C., Avila, J., Asensio, M.C., Varykhalov, A.Y., Nefedov, A., Woll, C., Kim, T.K., Hoesch, M., Fischer, F.R. and Grüneis, A. (2018). Boron-Doped Graphene Nanoribbons: Electronic Structure and Raman Fingerprint. ACS Nano, 8 (12). pp. 7571-7582. American Chemical Society. ISSN 1936-0851

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Abstract

We show that strong chemical interaction between boron doped graphene nanoribbons with N = 7 atoms width (B-7AGNRs) and an Au substrate leads to periodic out-of-plane corrugation and electron doping of B-7AGNRs. Using angle-resolved photoemission spectroscopy (ARPES), we find that the dopant-derived bands hybridize with substrate electronic states and spread in energy. The interaction with the substrate leaves the bands with pure carbon character unperturbed. This results in an identical effectives mass of ∼ 0.2 m0 compared to pristine 7AGNRs. The presence of boron atoms further manifests in the vibrational properties. We probe the phonons of B-7AGNRs in situ by Raman spectroscopy. We reveal the existence of characteristic splittings and red-shifts of Raman modes due to the presence of C-B bonds. The strongly hybridized electronic structure of the B-7AGNR - Au contact can be useful for carbon based nanoelectronics. The Raman fingerprint allows easy identification in device geometries.

Item Type:	Article
Creators:	Creators Email ORCID ORCID Put Code Senkovskiy, B.V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Usachov, D.Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fedorov, A.V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marangoni, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haberer, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tresca, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Profeta, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Caciuc, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tsukamoto, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Atodiresei, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ehlen, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chen, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Avila, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Asensio, M.C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Varykhalov, A.Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nefedov, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Woll, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, T.K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hoesch, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, F.R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grüneis, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-85624
Identification Number:	10.1021/acsnano.8b04125
Journal or Publication Title:	ACS Nano
Volume:	8
Number:	12
Page Range:	pp. 7571-7582
Date:	13 July 2018
Publisher:	American Chemical Society
ISSN:	1936-0851
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	Physics
Funders:	ERC grant no. 648589 ’SUPER-2D’, INST 216/808-1 FUGG, “Quantum Matter and Materials” (QM2) initiative, U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under Award no. DE-SC0010409, Center for Energy Efficient Electronics Science NSF Award 0939514, European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement n.312284 (CALIPSO), Institutional Strategy of the University of Cologne within the German Excellence Initiative
Projects:	DFG project CRC 1238 (project A1), DFG project GR 3708/2-1
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/8562