Impact of Inter-Wall Distance on Physical Properties of Metal-Semiconducting Double Walled Carbon Nanotube Quantum Dot
Autor: | Bashir Mohi Ud Din Bhat, Shabir Ahmad Bhat, Rayees Ahmad Zargar |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
енергія зв'язку
Radiation Materials science Double walled business.industry энергия связи quantum dot квантовая точка Condensed Matter Physics binding energy variational method Carbon nanotube quantum dot Metal квантова точка варіаційний метод visual_art visual_art.visual_art_medium вариационный метод Optoelectronics General Materials Science business |
Popis: | Here we report the effect of inter-wall distance of CNT on transmission probabilities of electrons and holes as well as their binding energies. The binding energies were calculated using the variational method within the effective mass approximation and confinement potential. The barrier transmission probabilities of electrons and holes were also calculated using varying potential barrier height and quantum mechanical tunnelling. The binding energy is found to be decreasing with inter-wall distance. We find the presence of outer wall causes a decrease in the transmission probability. For a given core radius, the transmission probability of hole increases linearly with increasing hole energy. CNT QDs of inter-wall distance 3 nm resembles to type II core-shell quantum dot (CSQD). The observed results were compared with the previous investigations. The inter-wall distance causes a decrease in the transmission probability. |
Databáze: | OpenAIRE |
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