Universität zu Köln

Senkovskiy, B. V., Haberer, D., Usachov, D. Yu., Fedorov, A. V., Ehlen, N., Hell, M., Petaccia, L., Di Santo, G., Durr, R. A., Fischer, F. R. and Grueneis, A. (2017). Spectroscopic characterization of N=9 armchair graphene nanoribbons. Phys. Status Solidi-Rapid Res. Lett., 11 (8). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1862-6270

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Abstract

We investigate the N=9 atoms wide armchair-type graphene nanoribbons (9-AGNRs) by performing a comprehensive spectroscopic and microscopic characterization of this novel material. In particular, we use X-ray photoelectron, near edge X-ray absorption fine structure, scanning tunneling, polarized Raman and angle-resolved photoemission (ARPES) spectroscopies. The ARPES measurements are aided by calculations of the photoemission matrix elements which yield the position in k space having the strongest photoemission cross section. Comparison with well-studied narrow N=7 AGNRs shows that the effective electron mass in 9-AGNRs is reduced by two times and the valence band maximum is shifted to lower binding energy by approximate to 0.6eV. In polarized Raman measurements of the aligned 9-AGNR, we reveal anisotropic signal depending upon the phonon symmetry. Our results indicate the 9-AGNRs are a novel 1D semiconductor with a high potential in nanoelectronic applications.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Senkovskiy, B. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haberer, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Usachov, D. Yu. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fedorov, A. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ehlen, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hell, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Petaccia, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Di Santo, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Durr, R. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, F. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grueneis, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-222824
DOI:	10.1002/pssr.201700157
Journal or Publication Title:	Phys. Status Solidi-Rapid Res. Lett.
Volume:	11
Number:	8
Date:	2017
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1862-6270
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ON-SURFACE SYNTHESIS; BAND-GAP Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22282