Hypersound Absorption of Acoustic Phonons in a degenerate Carbon Nanotube

Dompreh, K. A.; Mensah, N. G.; Mensah, S. Y.; Abukari, S. S.; Sam, Frederick; Edziah, R.

doi:10.48550/arxiv.1502.07636

Cited by 4 publications

(6 citation statements)

References 8 publications

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“…In Figure 2b, it is also observed that the dependence of j ac on q is strongly non-linear. The ratio of j ac Γ (where Γ is the hypersound absorption) in the absence of a drift velocity V D [43] is given as…”

Section: Numerical Analysismentioning

confidence: 99%

“…Recently, the need for acoustically driven current flow in semiconductor nano-structures has received particular attention as a means of generating or controlling single electrons and photons for quantum information processing [40,41,42]. From the hypersound absorption [43] studies conducted on CN T , it was found that CN T exhibit good AE effect but till date, there is no general analytical theory of Acoustoelectric effect in CN T . However, a few experimental work by Ebbecke et.…”

Section: Introductionmentioning

confidence: 99%

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Acoustoelectric Effect in degenerate Carbon Nanotube

Dompreh¹,

Mensah²,

Mensah³

et al. 2015

Preprint

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Acoustoelectric Effect AE in degenerate Carbon Nanotube (CN T ) was theoretically studied for hypersound in the regime ql >> 1. The dependence of acoustoelectric current j ac on the acoustic wave number q and frequency ω q at T = 10K and scattering angle (θ > 0) was evaluated at various harmonics n = ±1, 2, ... (where n is an integer). In the first harmonics (n = ±1), the non-linear dependence of j ac on ω q and q were obtained. For n = ±2, the numerically evaluated j ac qualitatively agreed with an experimentally obtained result.

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Section: Numerical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acoustoelectric Effect in degenerate Carbon Nanotube

Dompreh¹,

Mensah²,

Mensah³

et al. 2015

Preprint

Self Cite

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“…Acoustoelectric effect (AE) in Bulk and Low-dimensional semiconducting materials has been extensively studied both experimentally [1,2,3,4,5,6,7] and theoretically [8,9,10,11]. Recently, AE studies in Nano materials such as Graphene [12,13,14,15,16] and Carbon Nanotube (CNT) [17,18,19,20] has attracted special attention. This is due to the remarkable electrical and mechanical properties of these materials especially the extreme electron mobility which persist at room temperatures.…”

Section: Introductionmentioning

confidence: 99%

Acoustoelectric effect in graphene with degenerate energy dispersion

Dompreh¹,

Mensah

Mensah³

2017

Physica E: Low-dimensional Systems and Nanostructures

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The acoustoelectric effect AE in Graphene with degenerate energy dispersion is theoretically studied for hypersound in the regime ql >> 1. At low temperatures (k β T << 1), the non-linear dependence of Acoustoelectric current j/j 0 on the frequency ω q and temperature T are numerically analysed. The obtained graph for j/j 0 against ω q qualitatively agreed with an experimentally obtained results. For j/j 0 versus T , the dependence of Acoustoelectric current in Graphene was found to manifest at low temperatures.

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“…The amplification (absorption) of acoustic phonons in Graphene [1,2,3] and other low dimensional materials such as superlattices [4,5,6,7], carbon nanotubes (CNT) [8] and cylindrical quantum wires (CQW) [9] has attracted lots of attention recently. For Graphene, Nunes and Fonseca [3] studied amplification of acoustic phonons and determined the drift velocity V D at which amplification occurs but Dompreh et.…”

Section: Introductionmentioning

confidence: 99%