The intrinsic temperature effect of the Raman spectra of graphite
Data(s) |
1999
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Resumo |
The Raman spectra of ion-implanted highly oriented pyrolytic graphite (HOPG) are reported, in which an additional mode at 1083 cm(-1) and three doublet structures in the positions of similar to 1350, similar to 2450, and similar to 2710 cm(-1) are revealed. Noticeable frequency shifts are observed for all the Raman bands between the spectra excited with different laser powers, which are interpreted as the pure temperature effect and a downshift in the C-C stretching frequency induced by the thermal expansion. Moreover, the pure temperature effect (d omega/dT)(V) without anharmonic contribution is achieved in pristine HOPG. The results suggest that the pure temperature effect without anharmonic contribution plays an important role in the frequency shifts with temperature. (C) 1999 American Institute of Physics. [S0003-6951(99)01313-3]. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Tan PH; Deng YM; Zhao Q; Cheng WC .The intrinsic temperature effect of the Raman spectra of graphite ,APPLIED PHYSICS LETTERS,1999,74(13):1818-1820 |
Palavras-Chave | #半导体物理 #CARBON NANOTUBES #SCATTERING #1ST-ORDER #DIAMOND #DEPENDENCE #FIBERS #MODEL |
Tipo |
期刊论文 |