Premium
Raman Scattering from Single‐Crystal KC 60
Author(s) -
Winter J.,
Kuzmany H.
Publication year - 1996
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/(sici)1097-4555(199603)27:3/4<373::aid-jrs970>3.0.co;2-4
Subject(s) - raman spectroscopy , orthorhombic crystal system , raman scattering , materials science , analytical chemistry (journal) , crystal (programming language) , doping , phase transition , quenching (fluorescence) , single crystal , phase (matter) , crystal structure , crystallography , chemistry , optics , fluorescence , condensed matter physics , optoelectronics , physics , programming language , organic chemistry , chromatography , computer science
Raman scattering is used to analyse phase transitions and structures in KC 60 crystals. The doping of the crystals was performed at 450 K and studied in situ by observing the A g (2) pinch mode in the Raman spectrum. The crystals were homogeneously doped at least up to the penetration depth of the laser used. Slow cooling from 450 K to room temperature showed clearly the phase separation of KC 60 into C 60 and K 3 C 60 at 420 K. With fast cooling rates, dramatic changes in the Raman spectra were observed and interpreted as a phase transition to an orthorhombic structure as previously for RbC 60 . Quenching experiments for KC 60 showed that a fraction of KC 60 could be retained, but it dissolved rapidly even at temperatures below room temperature.