期刊
NANOSCALE RESEARCH LETTERS
卷 11, 期 -, 页码 -出版社
SPRINGER
DOI: 10.1186/s11671-015-1213-8
关键词
Single-walled carbon nanotube (SWCNT); Graphene; Resonance Raman spectroscopy; Double electron-phonon resonance mechanism (DR); Van Hove singularities; Arc-discharge method; Trigonal warping
资金
- State Fund For Fundamental Research [F64/32-2015]
Micro-Raman spectra of single-walled carbon nanotubes in the range of two-phonon 2D bands are investigated in detail. The fine structure of two-phonon 2D bands in the low-temperature Raman spectra of the mixture and individual single-walled carbon nanotubes is considered as the reflection of structure of their pi-electron zones. The dispersion behavior of 2D band fine structure components in the resonant Raman spectra of single-walled carbon nanotube mixture is studied depending on the energy of excitating photons. The role of incoming and outgoing electron-phonon resonances in the formation of 2D band fine structure in Raman spectra of single-walled carbon nanotubes is analyzed. The similarity of dispersion behavior of 2D phonon bands in single-walled carbon nanotubes, one-layer graphene, and bulk graphite is discussed.
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