Impact of Inter-Wall Distance on Physical Properties of Metal-Semiconducting Double Walled Carbon Nanotube Quantum Dot

Authors Bashir Mohi Ud Din Bhat1, Rayees Ahmad Zargar2, Shabir Ahmad Bhat3

1Department of Physics, GDC (Boys), Khanabal (Kashmir)-192101, India

2Department of Physics, Islamic university of Science & Techology, Awantipora-192122, India

3Deparment of Chemistry, GDC (Womens) Anantnag (Kashmir)-192101, India

Issue Volume 10, Year 2018, Number 2
Dates Received 07 December 2017; published online 29 April 2018
Citation Bashir Mohi Ud Din Bhat, Rayees Ahmad Zargar, Shabir Ahmad Bhat, J. Nano- Electron. Phys. 10 No 2, 02044 (2018)
PACS Number(s) 73.63.Kv, 73.63.Fg
Keywords Quantum dot (12) , Binding energy (7) , Variational method (2) .

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.

List of References