12 citations
4 papers · 1 filter
External electric field effect on electron transport in carbon nanotubes
S. S. Abukari, S. Y. Mensah, N. G. Mensah +3
Electronic transport properties of carbon nanotubes are studied theoretically in the presence of external electric field E(t) by using the Boltzmann's transport with constant relax…
Appearance of Negative Differential Conductivity in Graphene Nanoribbons at High-Harmonics
M. Rabiu, S. Y. Mensah, S. S. Abukari
We theoretically study current dynamics of graphene nanoribbons subject to bias dc and ac driven fields. We showed that graphene nanoribbons exhibit negative high-harmonic differen…
Generation and Amplification of Terahertz Radiation in Carbon Nanotubes
S. S. Abukari, S. Y. Mensah, N. G. Mensah +4
We investigate theoretically the feasibility of generation and amplification of terahertz radiation in aligned achiral carbon nanotubes (zigzag and armchair) in comparison with a s…
Terahertz Generation and Amplification in Graphene Nanoribbons in Multi-frequency Electric Fields
M. Rabiu, S. Y. Mensah, S. S. Abukari
We study theoretically a multi-frequency response of electrons in confined graphene subject to dc-ac driven fields. We explore the possibility for using graphene nanoribbons (GNRs)…