Magnetoelectronic properties of finite double-walled carbon nanotubes

Magnetoelectronic properties of finite double-walled carbon nanotubes, whose structure belongs to D5hD5h, are studied by the tight-binding model. Energy levels, energy gaps, and density of states strongly depend on intertube hoppings, nanotube length, strength and direction of the magnetic field, and the Zeeman splitting. Intertube interactions could change level spacings, modify energy gaps, and destroy state symmetry about the chemical potential. Magnetic field could induce destruction of state degeneracy, increase of low-energy states, and strong modulation of energy gap. Moreover, the Zeeman splitting plays an important role in the above-mentioned magnetoelectronic properties.