Semiconducting carbon nanotube quantum dots: Calculation of the interacting electron states by exact diagonalisationMervyn Roy and P. A. Maksym
Department of Physics and Astronomy, University of Leicester - University Road, Leicester LE1 7RH, UK, EU
received 30 October 2008; accepted in final form 2 April 2009; published May 2009
published online 7 May 2009
In semiconducting carbon nanotube quantum dots that contain a few interacting electrons the electron-electron correlation is always important. The states of up to six interacting electrons in such a dot are calculated by exact diagonalisation of a 2-band, effective mass Hamiltonian. The addition energy and the few-electron density are investigated for a wide range of dots with different physical properties and, in a large proportion of these dots, the electrons are found to form Wigner molecules.
73.63.Fg - Nanotubes.
73.21.La - Quantum dots.
73.23.Hk - Coulomb blockade; single-electron tunneling.
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