Photon-assisted transport in a carbon nanotube

Details Photon-assisted transport in a carbon nanotube Photon-assisted transport in a carbon nanotube

2006-11-14

arxiv.org/abs/cond-mat/0611378v1

Physical Review B 75, 115427 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures. Submitted to PRB

Scientific paper

10.1103/PhysRevB.75.115427

We investigate the quantum transport through a single-wall carbon nanotube connected to leads in the presence of an external radiation field. We analyze the conductance spectrum as a function of the frequency and strength of the field. We found that above a critical value of the field intensity, an enhancement of the conductance, or suppressed resistance, as a function of the field strength occurs. The conductance increases displaying oscillations which amplitude shows a strong dependence on the field frequency. For low radiation energies in comparison to the lead-CNT coupling energies, the oscillations evolve toward a structure of well defined steps in the conductance. We have shown that in this range of frequencies the field intensity dependence of the conductance can give direct information of single-walled carbon nanotubes energy spectra.

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