Theory of electron energy spectrum and Aharonov-Bohm effect in self-assembled InxGa1-xAs quantum rings in GaAs

We analyze theoretically the electron energy spectrum and the magnetization of an electron in a strained InxGa1-xAs/GaAs self-assembled quantum ring (SAQR) with realistic parameters, determined from the cross-sectional scanning-tunneling microscopy characterization of that nanostructure. The SAQRs have an asymmetric indium-rich craterlike shape with a depression rather than an opening at the center. Although the real SAQR shape differs strongly from an idealized circular-symmetric open ring structure, the Aharonov-Bohm oscillations of the magnetization survive.