Spectroscopic characterization of N = 9 armchair graphene nanoribbons
| Autor: | Senkovskiy, BV, Haberer, D, Usachov, DY, Fedorov, AV, Ehlen, N, Hell, M, Petaccia, L, Di Santo, G, Durr, RA, Fischer, FR, Grüneis, A |
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| Rok vydání: | 2017 |
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| Zdroj: | Physica Status Solidi-Rapid Research Letters, vol 11, iss 8 physica status solidi (RRL)-Rapid Research Letters, vol 11, iss 8 Senkovskiy, BV; Haberer, D; Usachov, DY; Fedorov, AV; Ehlen, N; Hell, M; et al.(2017). Spectroscopic characterization of N = 9 armchair graphene nanoribbons. Physica Status Solidi-Rapid Research Letters, 11(8). doi: 10.1002/pssr.201700157. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/4541w9fz |
| Popis: | © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 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 ∼0.6 eV. 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. |
| Databáze: | OpenAIRE |
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