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Browsing by Author "Mensah, S Y"

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Amplification of acoustic waves due to an external temperature gradient in super lattices

Mensah, S Y; Kangah, G K (University of Cape Coast, 1991)

Amplification of short-wave sound propagating along the axis of a semiconductor super lattice by electrons of the lowest mini band in an external temperature gradient is investigated theoretically. The mechanism of absorption ...
Differential thermopower of a CNT chiral carbon nanotube

Mensah, S Y; Allotey, FKA; Mensah, N G; Nkrumah, G (University of Cape Coast, 2000)

The differential thermo power of a chiral carbon nanotube (CNT) was calculated using a tractable analytical approach. We obtained an expression for the electrical conductivity σ and the thermopower α. The results were ...
Hypersound absorption of acoustic phonons in a degenerate carbon nanotube

Shmelev, G M; Mensah, S Y; Tsurkan, G I (University of Cape Coast, 1988)

Short-wave sound absorption propagating along the axis of a semiconductor superlattice by electrons of the lowest miniband in a non-quantised electric field is investigated theoretically. The mechanism of the attenuation ...
The negative differential effect in a semiconductor superlattice in the presence of an external electric field

Mensah, S Y (University of Cape Coast, 1992)

Bollzmann's equation is solved for an clectmn m lhe lowest miniband of a superlattice semiconductor under the influence of an fxlemal electric field E(t). The currentdensity electric field characteristic shows a negalive ...
Nonlinear acoustoelectric effect in a semiconductor superlattice

Mensah, S Y; Ahllotey, F.K.A; Mensah, N.G. (University of Cape Coast, 1999)

The acoustoelectric effect in a semiconductor superlattice (SL) has been studied for a hypersound in the region ql 1 (where q is the acoustic wave number and l is the electron mean free path). A nonlinear dependence of ...
Nonlinear acoustoelectric effect in a semiconductor superlattice

Mensah, S Y; Allotey, F.K.A; Mensah, N. G. (University of Cape Coast, 2000)

The acoustoelectric effect in a semiconductor superlattice (SL) has been studied for a hypersound in the region ql 1 (where q is the acoustic wave number and l is the electron mean free path). A nonlinear dependence of ...
The thermoelectric effect in a semiconductor superlattice in a non-quantized electric field

Mensah, S Y; Kangah, G K (University of Cape Coast, 1991)

The thermoelccvic effect in a semiconductor rupcrlatlicc in a non-quantize delectric Beld is investigated for elections of the lowest muband in the Linear approamation of VT. nalytlcll expressionsfor the thermopower and ...
The thermoelectric effect in a semiconductor superlattice in a non-quantized electric field

Mensah, S Y; Kangah, G K (University of Cape Coast, 1991)

The thermoelccvic effect in a semiconductor rupcrlatlicc in a non-quantized electric Beld is investigated for elections of the lowest muband in the Linear approamation of VT. nalytlcll expressionsfor the thermopower ...

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