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

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

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	Kourouklis, GA	en
dc.contributor.author	Ves, S	en
dc.date.accessioned	2014-03-01T01:47:29Z
dc.date.available	2014-03-01T01:47:29Z
dc.date.issued	1998	en
dc.identifier.issn	00444510	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25224
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0346875922&partnerID=40&md5=a069f378222e8daee2d01f475e1079e4	en
dc.title	Softening of phonon modes in C60 crystals induced by laser irradiation: Thermal effects	en
heal.type	journalArticle	en
heal.publicationDate	1998	en
heal.abstract	Reversible softening of the intramolecular Ag(2) pentagonal pinch (PP) mode of a C60 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 Hg(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 anti-Stokes 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 C60.	en
heal.journalName	Zhurnal Eksperimental'noj i Teoreticheskoj Fiziki	en
dc.identifier.volume	114	en
dc.identifier.issue	5	en
dc.identifier.spage	1785	en
dc.identifier.epage	1794	en