Defect modulated Raman response of KC(8) single crystals
- Author(s)
- Julio Cesar Chacon Torres, Thomas Pichler
- Abstract
In situ experiments of graphite intercalation with potassium have been performed under high vacuum (HV) conditions. A detailed Raman lineshape analysis of the G-line was applied to determine the intrinsic response of the stage one KC(8) compound. Four defect-modulated graphite single crystals were analyzed. We observe five vibrational modes (similar to 560, 1260, 1510, 1547, and 1563 cm(-1)). From a Breit-Wigner-Fano (BWF) lineshape analysis we elucidate the contribution of each vibrational mode observed. The intensity of the z-axis mode (CZ) around similar to 560 cm(-1) varies depending on the defect modulated nominal KC(8) crystal chosen. We prove that the intrinsic G-line of KC(8) is at 1510 cm(-1), and it is strongly dependent on the actual defect content in the sample, which has important implications for the electron phonon coupling (EPC) responsible of superconductivity in this system
- Organisation(s)
- Electronic Properties of Materials
- Journal
- Physica Status Solidi. B: Basic Research
- Volume
- 248
- Pages
- 2744-2747
- No. of pages
- 4
- ISSN
- 0370-1972
- DOI
- https://doi.org/10.1002/pssb.201100135
- Publication date
- 2011
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 2020 Electrical Engineering, Electronics, Information Engineering
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/defect-modulated-raman-response-of-kc8-single-crystals(5948bddf-e0c6-4dac-a07c-0bc112b11f1a).html