Softening of phonon modes in C60 crystals induced by laser irradiation: Thermal effects

Meletov, KP; Liarokapis, E; Arvanitidis, J; Papagelis, K; Ves, S; Kourouklis, GA

dc.contributor.author	Meletov, KP	en
dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Arvanitidis, J	en
dc.contributor.author	Papagelis, K	en
dc.contributor.author	Ves, S	en
dc.contributor.author	Kourouklis, GA	en
dc.date.accessioned	2014-03-01T01:14:10Z
dc.date.available	2014-03-01T01:14:10Z
dc.date.issued	1998	en
dc.identifier.issn	1063-7761	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12901
dc.subject	Experimental Data	en
dc.subject	Numerical Calculation	en
dc.subject	Power Density	en
dc.subject	Raman Scattering	en
dc.subject	Single Crystal	en
dc.subject	Temperature Dependence	en
dc.subject	Temperature Distribution	en
dc.subject	Thermal Conductivity	en
dc.subject	Thermal Effects	en
dc.subject	Face Centered Cubic	en
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	RAMAN-SPECTROSCOPY	en
dc.subject.other	ORDERING TRANSITION	en
dc.subject.other	ABSORPTION-SPECTRA	en
dc.subject.other	SCATTERING	en
dc.subject.other	FILMS	en
dc.subject.other	BEAM	en
dc.subject.other	C60	en
dc.subject.other	CONDUCTIVITY	en
dc.subject.other	PRESSURES	en
dc.title	Softening of phonon modes in C60 crystals induced by laser irradiation: Thermal effects	en
heal.type	journalArticle	en
heal.identifier.primary	10.1134/1.558746	en
heal.identifier.secondary	http://dx.doi.org/10.1134/1.558746	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	Reversible softening of the intramolecular A(g) (2) pentagonal pinch (PP) mode of a C-60 single crystal in the face centered cubic phase has been studied as a function of laser power density by means of Raman scattering. The average temperature rise in the laser excitation spot has been determined using the Stokes to anti-Stokes integrated peak intensity ratio for the H-g (1) phonon mode. Softening of the PP-mode was found to be due to heating of the sample resulting from laser irradiation, in good quantitative agreement with experimental results obtained for uniformly heated samples. These findings are in excellent agreement with results obtained by numerical calculations of the local temperature distribution and average temperature in the laser spot based on calculated integrated intensities of the Stokes and antiStokes bands of the PP- mode. These calculations were based on experimental data for the temperature dependence of phonon frequency and width, absorbance, and thermal conductivity in solid C-60. (C) 1998 American Institute of Physics. [S1063-7761(98)01611-4].	en
heal.publisher	AMER INST PHYSICS	en
heal.journalName	Journal of Experimental and Theoretical Physics	en
dc.identifier.doi	10.1134/1.558746	en
dc.identifier.isi	ISI:000077406700016	en
dc.identifier.volume	87	en
dc.identifier.issue	5	en
dc.identifier.spage	967	en
dc.identifier.epage	972	en