Abstract
The minimal-coupled Pauli equation is used to calculate the linear microscopic spin conductivity tensor of a circular mesoscopic free-electron ring possessing complete (single-level) transverse electron confinement. A detailed comparison of the structures (and magnitudes) of the spin and space conductivity tensors is made. When the incident electric field is polarized perpendicular to the plane of the ring only the spin conductivity is nonvanishing. The polarization selection rules for the spin conductivity always involve a transfer of orbital angular momentum between neighbouring running ring states. Numerical spectral results are presented for a nano-sized Al ring excited perpendicular to the ring plane for different temperatures. The frequency spectra of the relevant spin conductivity component are qualitatively different for rings holding even and uneven half number of electrons due to different state occupancy probabilities near the Fermi edge. Far-field electromagnetic scattering spectra related to the spin dynamics are calculated in the limit where the quantum ring behaves as an electric-dipole absorber and radiator.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
