Weak localization measurements of electronic scattering rates in Li-doped epitaxial graphene
| العنوان: | Weak localization measurements of electronic scattering rates in Li-doped epitaxial graphene |
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| المؤلفون: | Stiven Forti, Andreas Stohr, Ulrich Starke, Pinder Dosanjh, Kristen Kaasbjerg, Ali Khademi, Joshua Folk |
| المصدر: | Khademi, A, Kaasbjerg, K, Dosanjh, P, Stöhr, A, Forti, S, Starke, U & Folk, J A 2019, ' Weak localization measurements of electronic scattering rates in Li-doped epitaxial graphene ', Physical Review B, vol. 100, no. 16, 161405 . https://doi.org/10.1103/physrevb.100.161405 |
| بيانات النشر: | American Physical Society (APS), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Materials science, Photoemission spectroscopy, FOS: Physical sciences, chemistry.chemical_element, 02 engineering and technology, Electronic structure, 01 natural sciences, law.invention, Condensed Matter::Materials Science, law, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Physics::Atomic and Molecular Clusters, Physics::Chemical Physics, 010306 general physics, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, Scattering, Graphene, Doping, 021001 nanoscience & nanotechnology, Weak localization, chemistry, Lithium, Density functional theory, 0210 nano-technology |
| الوصف: | Early experiments on alkali-doped graphene demonstrated that the dopant adatoms modify the conductivity of graphene significantly, as extra carriers enhance conductivity while Coulomb scattering off the adatoms suppresses it. However, conductivity probes the overall scattering rate, so a dominant channel associated with long-range Coulomb scattering will mask weaker short-range channels. We present weak localization measurements of epitaxial graphene with lithium adatoms that separately quantify intra- and intervalley scattering rates, then compare the measurements to tight-binding calculations of expected rates for this system. The intravalley rate is strongly enhanced by Li deposition, consistent with Coulomb scattering off the Li adatoms. A simultaneous enhancement of intervalley scattering is partially explained by extra carriers in the graphene interacting with residual disorder. But differences between measured and calculated rates at high Li coverage may indicate adatom-induced modifications to the band structure that go beyond the applied model. Similar adatom-induced modifications of the graphene bands have recently been observed in angle-resolved photoemission spectroscopy, but a full theoretical understanding of these effects is still in development. |
| وصف الملف: | application/pdf |
| تدمد: | 2469-9969 2469-9950 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::afd1b6b9e26e5d693bf6d6c30f3cb2f5 https://doi.org/10.1103/physrevb.100.161405 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....afd1b6b9e26e5d693bf6d6c30f3cb2f5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699969 24699950 |
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