Unusual Aharonov–Bohm oscillations in the energy and magnetic dipole moment of a semiconductor conical nanotube under external fields

• Published in: Physica. B, Condensed matter Vol. 599; p. 412582
• Main Authors: Forero, Ana M., Gutiérrez, W., Herrera, J.R., Miranda, David A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.12.2020; Elsevier BV
• Subjects: Aharonov–Bohm oscillations; Cadmium selenides; Dipole moments; Electric fields; Electron energy; Energy spectrum; Finite element method; Magnetic dipole moment; Magnetic dipoles; Magnetic fields; Magnetic properties; Magnetoelectric effect; Nanoparticles; Nanostructure; Nanostructured materials; Nanotubes; Nanowires; One-electron conical nanotube; Oscillations; Quantum wells; Semiconductors; Energy spectrum; Finite element method; Magnetoelectric effect; Magnetic dipole moment; One-electron conical nanotube; Aharonov–Bohm oscillations
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2020.412582

Semiconductor nanostructures are an active subject of research by its quantum properties and its potential applications. Nanostructures include nanoparticles, nanowires, quantum wells, and other nanometric structures. We modeled by finite element method the spectrum of an electron confined in a truncated cone-shaped CdSe nanotube. Simulations include the study of the electron energy behavior and the magnetic dipole moment in an electric and magnetic field, including the simultaneous application of both fields. The results of simulations reveal an atypical behavior in the Aharonov–Bohm oscillations in the energy and the magnetic dipole moment when the nanotube’s conicity degree increases. We also found the possibility of restructuring the nanostructure’s magnetic properties through the application of electric fields. In this way, this work shows that semiconductor conical nanotubes can be ideal candidates for the design of materials with novel magnetoelectric properties. •A Geometric potential arises naturally using the finite element method.•Magnetoelectric effect in conical nanotubes for developing new devices.•Oscillations of the ground state energy depend on the conicity of the nanotube.•An oscillatory-type probability density behavior occurs for the ground state.