%0 Journal Article
%T Semiconductor Fluorinated Carbon Nanotube as a Low Voltage Current Amplifier Acoustic Device
%A D. Sakyi-Arthur
%A S. Y. Mensah
%A K. W. Adu
%A K. A. Dompreh
%A R. Edziah
%A N. Mensah
%A C. Jebuni-Adanu
%J World Journal of Condensed Matter Physics
%P 12-25
%@ 2160-6927
%D 2020
%I Scientific Research Publishing
%R 10.4236/wjcmp.2020.101002
%X Acoustoelectric effect (AE) in a non-degenerate fluorinated single walled carbon nanotube (FSWCNT) semiconductor was carried out using a tractable analytical approach in the hypersound regime , where q is the acoustic wavenumber and
is the electron mean-free path. In the presence of an external electric field, a strong nonlinear dependence of the normalized AE current density
, on
(
is the electron drift velocity and
is the speed of sound in the medium) was observed and depends on the acoustic wave frequency,
, wavenumber q, temperature T and the electron-phonon interactions parameter,
. When
,
decreases to a resonance minimum and increases again, where the FSWCNT is said to be amplifying the current. Conversely, when
,
rises to a maximum and starts to decrease, similar to the observed behaviour in negative differential conductivity which is a consequence of Bragg¡¯s reflection at the band edges at T=300K. However, FSWCNT will offer the potential for room temperature application as an acoustic switch or transistor and also as a material for ultrasound current source density imaging (UCSDI) and AE hydrophone devices in biomedical engineering. Moreover, our results prove the feasibility of implementing chip-scale non-reciprocal acoustic devices in an FSWCNT platform through acoustoelectric amplification.