Multiple electronic Raman scatterings in a single metallic carbon nanotube
Penulis: Dr. Eddwi Hesky Hasdeo S.Si., M.Sc.,Daqi Zhang (张达奇), Juan Yang (杨娟), Can Liu (刘灿), Kaihui Liu (刘开辉), Riichiro Saito, and Yan Li (李彦)We observe multiple electronic Raman scatterings (ERSs) in a single suspended metallic single-walled carbon nanotube. The ERS process originates from the inelastic scattering of photoexcited excitons by a continuum of low-lying electron-hole pairs. In previous work, the observed Fano factor of the G band line shape is always negative; however, in this work we find that the Fano factor can be either positive or negative depending on the relative position of the nearest ERS with respect to the G band. This supports the idea that the origin of the G band asymmetry is an interference between the discrete G band and the continuous ERS. We also report that the ERS position and intensity are sensitive to the nanotube bundling effect and the laser heating effect.
Physical Review B, (2016), 93, 245428
ISSN / ISBN / IBSN : 2469-9950 (print) 2469-9969 (online) 1538-4489 (CD-ROM)
No. Arsip : LIPI-20180611