Raman response of stage-1 graphite intercalation compounds revisited

Chacón-Torres, JC, Ganin, AY, Rosseinsky, MJ ORCID: 0000-0002-1910-2483 and Pichler, T (2012) Raman response of stage-1 graphite intercalation compounds revisited Physical Review B Condensed Matter and Materials Physics, 86 (7). 075406-. ISSN 1098-0121, 1550-235X

Text 1204.5971v3.pdf - Published version Download (612kB)

Abstract

We present a detailed in situ Raman analysis of stage-1 KC <inf>8</inf>, CaC <inf>6</inf>, and LiC <inf>6</inf> graphite intercalation compounds to unravel their intrinsic fingerprint. Four main components were found between 1200 cm ^-1 and 1700 cm ^-1 and each of them were assigned to a corresponding vibrational mode. From a detailed line-shape analysis of the intrinsic Fano lines of the G- and D-line response we precisely determine the position (ω <inf>ph</inf>), line width (Γ <inf>ph</inf>), and asymmetry (q) from each component. The comparison to the theoretical calculated line width and position of each component allows us to extract the electron-phonon coupling constant of these compounds. A coupling constant λ <inf>ph</inf><0.06 was obtained. This highlights that Raman active modes alone are not sufficient to explain the superconductivity within the electron-phonon coupling mechanism in CaC <inf>6</inf> and KC <inf>8</inf>. © 2012 American Physical Society.

Item Type:	Article
Additional Information:	6 pages, 3 figures, 2 tables
Uncontrolled Keywords:	physics.optics, physics.optics, cond-mat.mtrl-sci
Depositing User:	Symplectic Admin
Date Deposited:	01 Aug 2016 10:28
Last Modified:	21 Apr 2026 23:17
DOI:	10.1103/PhysRevB.86.075406
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3002650
Disclaimer:	The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.