Universal vibrational anharmonicity in carbyne-like materials
- Author(s)
- Johannes M.A. Lechner, Pietro Marabotti, Lei Shi, Thomas Pichler, Carlo Spartaco Casari, Sebastian Heeg
- Abstract
Carbyne, an infinite linear chain of carbon atoms, is the truly one-dimensional allotrope of carbon. While ideal carbyne and its fundamental properties have remained elusive, carbyne-like materials such as carbyne chains confined inside carbon nanotubes are available for study. Here, we probe the longitudinal optical phonon (C mode) of confined carbyne chains by Raman spectroscopy up to the third overtone. We observe a strong vibrational anharmonicity that increases with decreasing C mode frequency, reaching up to 8% for the third overtone. Moreover, we find that the relation between vibrational anharmonicity and C mode frequency is universal to carbyne-like materials, including ideal carbyne. This establishes experimentally that carbyne and related materials have pronounced anharmonic potential landscapes which must be included in the theoretical description of their structure and properties.
- Organisation(s)
- Electronic Properties of Materials
- External organisation(s)
- Humboldt-Universität zu Berlin, Sun Yat-sen University, Politecnico di Milano
- Journal
- Nature Communications
- Volume
- 16
- Pages
- 4360
- No. of pages
- 8
- ISSN
- 2041-1723
- DOI
- https://doi.org/10.48550/arXiv.2410.14820
- Publication date
- 05-2025
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103009 Solid state physics, 103018 Materials physics, 103020 Surface physics
- ASJC Scopus subject areas
- General Chemistry, General Biochemistry,Genetics and Molecular Biology, General Physics and Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/9fa2c5d5-50bf-4468-881b-d20f9572f075