8 citations · 44 across the 17 of their papers we have counts for
17 papers
On the amplification of acoustic phonons in carbon nanotube
K. A. Dompreh, N. G. Mensah, D. Sakyi-Arthur +1
We present a theoretical study of acoustic phonons amplification in Carbon Nanotubes (CNT). The phenomenon is via Cerenkov emission (CE) of acoustic phonons using intraband transit…
Influence of external temperature gradient on acoustoelectric current in graphene
K. A. Dompreh, N. G. Mensah, S. Y. Mensah +1
Recent analyses of thermoelectric amplification of acoustic phonons in Free-Standing Graphene (FSG) have prompted the theoretical study of the influence of external te…
Nonlinear Conductivity in Graphene
S. S. Abukari, S. Y. Mensah, R. Musah +2
We consider the tight-binding approximation for the description of energy bands of graphene, together with the standard Boltzmann's transport equation and constant relaxation time,…
Thermoelectric Amplification of Phonons in Graphene
K. A. Dompreh, S. Y. Mensah, N. G. Mensah +1
Amplification of acoustic phonons due to an external temperature gredient () in Graphene was studied theoretically. The threshold temperature gradient …
Amplification of Hypersound in Graphene with degenerate energy dispersion
Kwadwo A. Dompreh, Natalia G. Mensah, Samuel Y. Mensah
Hypersound amplification/absorption of acoustic phonons in Graphene with degenerate energy dispersion near the Fermi level was theoretically studied. For $k_βT <<…
Acoustomagnetoelectric Effect in Graphene Nanoribbon in the Presence of External Electric and Magnetic Field
K. A. Dompreh, S. Y. Mensah, S. S. Abukari +3
The Acoustomagnetoelectric Effect (AME) in Graphene Nanoribbon (GNR) was theoretically studied using the Boltzmann kinetic equation. On open circuit, the general formular for Surfa…
Amplification of Acoustic Waves in Graphene Nanoribbon in the Presence of External Electric and Magnetic Field
K. A. Dompreh, S. Y. Mensah, S. S. Abukari +2
Amplification of Acoustic Waves in Armchair Graphene Nanoribbon (AGNR) in the presence of an external Electric and Magnetic field was studied using the Boltzmann's kinetic equation…
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)…
Photon-Assisted Process and High-Harmonic Dynamic Localization in Graphene Nanoribbons
M. Rabiu, S. Y. Mensah, S. S. Abukari
We used a complete tight-binding band structure of graphene nanoribbon to obtain, for the first time, analytical techniques for observing photon assisted transport, and dynamic loc…
General Scattering Mechanism and Transport in Graphene
M. Rabiu, S. Y. Mensah, S. S. Abukari
Using quasi-time dependent semi-classical transport theory in RTA, we obtained coupled current equations in the presence of time varying field and based on general scattering mecha…
Amplification of acoustic phonons in superlattice
Kwadwo A. Dompreh, Samuel Y. Mensah, Natalia G. Mensah +3
The amplification of acoustic phonons in a superlattice in the presence of an electric field has been investigated theoretically and numerically by computati…
Direct current generation due to wave mixing in zigzag carbon nanotubes
S. S. Abukari, S. Y. Mensah, N. G. Mensah +3
Generation of direct current in zigzag carbon nanotubes due to harmonic mixing of two coherent electromagnetic waves is being considered. The electromagnetic waves have commensurat…
Generation of Terahertz Radiation by Wave Mixing in Armchair Carbon Nanotubes
S. Y. Mensah, S. S. Abukaria, N. G. Mensah +3
Using semiclassical Boltzmann equation we have studied theoretically an effect of a direct current (DC) generation in undoped armchair carbon nanotube (CN) by mixing two coherent e…
Generation of Terahertz Radiation by Wave Mixing in Zigzag Carbon Nanotubes
S. Y. Mensah, S. S. Abukari, N. G. Mensah +3
With the use of the semiclassical Boltzmann equation we have calculated a direct current (d.c) in undoped zigzag carbon nanotube (CN) by mixing two coherent electromagnetic waves w…