Fermi velocity renormalization in graphene probed by terahertz time-domain spectroscopy
| Autor: | Meihui Wang, Peter Uhd Jepsen, Deping Huang, Ismael Garcia Serrano, Qian Shen, Antti-Pekka Jauho, Rodney S. Ruoff, Patrick Rebsdorf Whelan, José M. Caridad, M. Venkata Kamalakar, Peter Bøggild, Haofei Shi, Binbin Zhou, David M. A. Mackenzie, Jie Ji, Da Luo |
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| Přispěvatelé: | Danmarks Tekniske Universitet, Uppsala University, Department of Electronics and Nanoengineering, Chinese Academy of Sciences, Institute for Basic Science, Ulsan National Institute of Science and Technology, Aalto-yliopisto, Aalto University |
| Rok vydání: | 2020 |
| Předmět: |
Terahertz radiation
Physics::Optics FOS: Physical sciences 02 engineering and technology 01 natural sciences law.invention Renormalization law 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) General Materials Science 010306 general physics Spectroscopy Terahertz time-domain spectroscopy Condensed Matter::Quantum Gases Physics Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Graphene Mechanical Engineering Materials Science (cond-mat.mtrl-sci) Fermi energy General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 3. Good health Fermi velocity renormalization. mobility mapping Flexible substrates THz-TDS Mechanics of Materials Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Fermi Gamma-ray Space Telescope |
| Zdroj: | Whelan, P R, Shen, Q, Zhou, B, Serrano, I G, Kamalakar, M V, MacKenzie, D M A, Ji, J, Huang, D, Shi, H, Luo, D, Wang, M, Ruoff, R S, Jauho, A P, Jepsen, P U, Bøggild, P & Caridad, J M 2020, ' Fermi velocity renormalization in graphene probed by terahertz time-domain spectroscopy ', 2D materials, vol. 7, no. 3, 035009 . https://doi.org/10.1088/2053-1583/ab81b0 |
| DOI: | 10.48550/arxiv.2006.00486 |
| Popis: | We demonstrate terahertz time-domain spectroscopy (THz-TDS) to be an accurate, rapid and scalable method to probe the interaction-induced Fermi velocity renormalization {\nu}F^* of charge carriers in graphene. This allows the quantitative extraction of all electrical parameters (DC conductivity {\sigma}DC, carrier density n, and carrier mobility {\mu}) of large-scale graphene films placed on arbitrary substrates via THz-TDS. Particularly relevant are substrates with low relative permittivity (< 5) such as polymeric films, where notable renormalization effects are observed even at relatively large carrier densities (> 10^12 cm-2, Fermi level > 0.1 eV). From an application point of view, the ability to rapidly and non-destructively quantify and map the electrical ({\sigma}DC, n, {\mu}) and electronic ({\nu}F^* ) properties of large-scale graphene on generic substrates is key to utilize this material in applications such as metrology, flexible electronics as well as to monitor graphene transfers using polymers as handling layers. Comment: 23 pages, 8 figures |
| Databáze: | OpenAIRE |
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