Electron Localization and Energy Levels' Oscillations Induced by Controlled Deformation

TL;DR

This paper demonstrates how external deformation controls electron localization and induces energy level oscillations in one-dimensional quantum systems, with potential applications in layered structures and hybrid perovskites.

Contribution

It introduces a method to manipulate energy levels and electron localization through controlled deformation in various quantum systems, combining numerical and analytical approaches.

Findings

Energy level oscillations linked to avoided crossings

Deformation alters electron spatial localization

Oscillations observed across different quantum structures

Abstract

Manipulating energy levels while controlling the electron localization is an essential step for many applications of confined systems. In this paper we demonstrate how to achieve electron localization and induce energy level oscillation in one-dimensional quantum systems by externally controlling the deformation of the system. From a practical point of view, the one-dimensional potentials can be realized using layered structures. In the analysis, we considered three different examples. The first one is a graded quantum well between confining infinite walls where the deformation is modeled by varying slightly the graded well. The second systems is a symmetric multiple quantum well between infinite walls under the effect of biasing voltage. The third system is a layered 2D hybrid perovskites where pressure is used to induce deformation. The calculations are conducted both numerically and analytically using the perturbation theory. It is shown that the obtained oscillations are associated with level avoided crossings and that the deformation results in changing the spatial localization of the electrons.