| Title: | Atomic scale visualization of vibrational modes in armchair graphene nanoribbon |
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| Authors: | ID Šćepanović, Stefan, Institut "Jožef Stefan" (Author)
ID López-Alcalá, Diego (Author)
ID Baldoví, José J. (Author)
ID Vahl, Alexander (Author)
ID Hassanien, Abdou, Institut "Jožef Stefan" (Author) |
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| Files: |  URL - Source URL, visit https://onlinelibrary.wiley.com/doi/10.1002/pssr.202500203
 PDF - Presentation file, download (1,77 MB)
MD5: 810478FF5B67360125782DB36E7FF953
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | Using scanning tunneling microscopy (STM) and inelastic tunneling spectroscopy, the low-frequency vibrational modes of a 7-atom wide armchair graphene nanoribbon (7-AGNR) is mapped. The inelastic tunneling channel is enhanced over the elastic one by a covalently bonded 7-AGNR to the apex of an STM tip. This setup has led to resonant inelastic tunneling between vibrational states of supported 7-GNR on Au(111) substrate and the states of the functionalized STM tip. The low-energy spectra reveal two localized peaks at the armchair edges with energies at ±14 and ±30 mV. The peaks are assigned to twice the energies of longitudinal compressive and shear-like modes of 7-AGNR, respectively. Remarkably, the well-separated peaks evolve rapidly into one broader peak toward the bulk of the ribbon due to scattering from substrate interactions. This suggests that edge state phonons are uniquely protected from the microenvironment and may have a profound effect on the transport properties of GNR devices. |
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| Keywords: | scanning tunneling microscopy, inelastic tunneling spectroscopy, armchair graphene nanoribbons |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 26.05.2025 |
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| Publication date: | 17.08.2025 |
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| Publisher: | Wiley |
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| Year of publishing: | 2025 |
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| Number of pages: | str. 1-7 |
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| Numbering: | Vol. 19, iss. , [article no.] 2500203 |
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| Source: | ZDA |
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| PID: | 20.500.12556/DiRROS-23620  |
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| UDC: | 620.3 |
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| ISSN on article: | 1862-6270 |
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| DOI: | 10.1002/pssr.202500203 |
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| COBISS.SI-ID: | 248621315 |
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| Copyright: | ©2025 The Author(s). |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 11. 9. 2025;
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| Publication date in DiRROS: | 12.09.2025 |
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| Views: | 269 |
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| Downloads: | 131 |
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