Spin magnetic moment and persistent orbital currents in cylindrical nanolayer

• Electrodynamical and spin properties of cylindrical nanostructures are considered.
• Energetic spectrum and wave functions for each case of nanostructure are calculated.
• Dependence of orbital current density on radial coordinate is obtained.
• Dependence of spin-magnetic moment current density on radial coordinate is obtained.

Densities of persistent orbital and spin magnetic moment currents of an electron in a cylindrical nanolayer in the presence of external axial magnetic field are considered. For the mentioned current densities analytical expressions are obtained. The conditions when in the system only spin magnetic moment current is present are defined. Dependencies of orbital and spin magnetic moment currents on geometrical parameters of nanolayer are derived. It is shown that in the case of layered geometry the dependence of spin magnetic moment current on radial coordinate has a non-monotonic behavior and changes the sign. This is the peculiarity of layered geometry of nanostructure and it is due to the behavior of wave function of the system along the radial direction. Dependent on the directions of the field and orbital rotation of the electron there are defined values of radial coordinates when the orbital current disappears. The transition to the case of cylindrical quantum dot is discussed as well.