Stark effect in a wedge-shaped quantum box

Abstract

The effect of an external applied electric field on the electronic ground state energy of a quantum box with a geometry defined by a wedge is studied by carrying out a variational calculation. This geometry could be used as an approximation for a tip of a cantilever of an atomic force microscope. We study theoretically the Stark effect as function of the parameters of the wedge: its diameter, angular aperture and thickness; as well as function of the intensity of the external electric field applied along the axis of the wedge in both directions; pushing the carrier towards the wider or the narrower parts. A confining electronic effect, which is sharper as the wedge dimensions are smaller, is clearly observed for the first case. Besides, the sign of the Stark shift changes when the angular aperture is changed from small angles to angles θ>π. For the opposite field, the electronic confinement for large diameters is very small and it is also observed that the Stark shift is almost independent with respect to the angular aperture. : 73.21.-b; 85.85.+j; 02.90.+p. PACS

Influence of Noise–Anharmonicity Interplay on a Few Physical Properties of Quantum Dots

“…[50] As a natural consequence, we come across an abundance of important works on SS of LDSS. [45][46][47][48][49][50][51][52][53][54][55] SS is defined as the energy difference in the presence and absence of the electric field and is given by [46,47,55]…”