The electron–phonon coupling constant for single-layer graphene on metal substrates determined from He atom scattering
| Autor: | Salvador Miret-Artés, J. R. Manson, Giorgio Benedek |
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| Přispěvatelé: | CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI), Ministerio de Economía y Competitividad (España), Consejo Superior de Investigaciones Científicas (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
FOS: Physical sciences General Physics and Astronomy 02 engineering and technology 01 natural sciences Molecular physics law.invention Superconductivity (cond-mat.supr-con) law 0103 physical sciences Atom Physics::Atomic and Molecular Clusters Boundary value problem Graphite Physical and Theoretical Chemistry 010306 general physics Helium atom scattering Condensed Matter - Materials Science Graphene Scattering Condensed Matter - Superconductivity Attenuation Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Semimetal 0210 nano-technology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | 11 pags., 3 figs., 1 tab. -- We adknowledge support by the CSIC Open Access Publication Initiative through its Unit Information Resources for Research (URICI) Recent theory has demonstrated that the value of the electron–phonon coupling strength l can be extracted directly from the thermal attenuation (Debye–Waller factor) of helium atom scattering reflectivity. This theory is here extended to multivalley semimetal systems and applied to the case of graphene on different metal substrates and graphite. It is shown that l rapidly increases for decreasing graphene–substrate binding strength. Two different calculational models are considered which produce qualitatively similar results for the dependence of l on binding strength. These models predict, respectively, values of lHAS = 0.89 and 0.32 for a hypothetical flat free-standing single-layer graphene with cyclic boundary conditions. The method is suitable for analysis and characterization of not only the graphene overlayers considered here, but also other layered systems such as twisted graphene bilayers. This work is partially supported by a grant with Ref. FIS2017-83473-C2-1-P from the Ministerio de Ciencia (Spain). We also acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI) |
| Databáze: | OpenAIRE |
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