Effect of variation of the central-hole depth and the axial anisotropy on the AB oscillations in a wide nanoring

2nd Colombian Congress of Electrochemistry; 2nd Symposium on Nanoscience and Nanotechnology

物理学;化学

Prada, F.A. Rodríguez^1,2 ; Gutiérrez, W.^1 ; Mikhailov, I.D.^1

Universidad de Santander (UDES), Bucaramanga, Colombia^1

Universidad Industrial de Santander (UIS), Bucaramanga, Colombia^2

关键词: Adiabatic limit;    Axial anisotropy;    Circular current;    External magnetic field;    Lateral dimension;    Layer thickness;    Quantum ring;    Spectral properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/786/1/012007/pdf
DOI  :  10.1088/1742-6596/786/1/012007

来源: IOP

【 摘 要 】

The effect of the external magnetic field on the spectral properties of one-electron non-uniform quantum ring with radially directed hills is analysed. The corresponding one-particle wave equation is separable in the adiabatic limit, when the layer thickness is essentially smaller than its lateral dimension. Our calculations show that the presence of a single axially directed hill as well as a rise of the central hole thickness produce a quenching of the Aharonov-Bohm (AB) oscillations of the lower energy levels and of the magnetic momentum. However, as the number of radially directed hills is increased, the system exhibits again oscillations, resulted from an enhancement of tunnelling circular currents.