| AVS 58th Annual International Symposium and Exhibition | |
| Electron Transport in Low Dimensional Materials Focus Topic | Tuesday Sessions |
| Session ET+EM+NS+GR-TuM |
| Session: | Electron Behaviors in Nanoelectronics, Interconnect, and Carbon-based Materials |
| Presenter: | Stephen Cronin, University of Southern California |
| Correspondent: | Click to Email |
Our ability to fabricate nearly defect-free, suspended carbon nanotubes
(CNTs) has enabled us to observe several phenomena never seen before in CNTs, including breakdown of the Born-Oppenheimer approximation[1], mode selective electron-phonon coupling[2], leading to negative differential resistance (NDR) and non-equilibrium phonon populations, and a Mott insulator transition[3]. In this work, Raman spectroscopy is used to measure individual, suspended CNTs under applied gate and bias potentials. Raman spectroscopy of periodic ripple formation in suspended graphene will also be reported. As will be shown, preparing clean, defect-free devices is an essential prerequisite for studying the rich low-dimensional physics of CNTs and graphene.
1. Bushmaker, A.W., Deshpande, V.V., Hsieh, S., Bockrath, M.W., and
Cronin, S.B., "Direct Observation of Born-Oppenheimer Approximation Breakdown in Carbon Nanotubes." Nano Letters, 9, 607 (2009).
2. Bushmaker, A.W., Deshpande, V.V., Bockrath, M.W., and Cronin,
S.B., "Direct Observation of Mode Selective Electron-Phonon Coupling in Suspended Carbon Nanotubes." Nano Letters, 7, 3618 (2007).
3. Bushmaker, A.W., Deshpande, V.V., Hsieh, S., Bockrath, M.W., and
Cronin, S.B., "Large Modulations in the Intensity of Raman-Scattered Light from Pristine Carbon Nanotubes." Physical Review Letters, 103, 067401 (2009).