Parity Effects in Stacked Nanoscopic Quantum Rings

Abstract

The ground state and the dielectric response of stacked quantum rings are investigated in the presence of an applied magnetic field along the ring axis. For odd number $N$ of rings and an electric field perpendicular to the axis, a linear Stark effect occurs at distinct values of the magnetic field. At those fields energy levels cross in the absence of electric field. For even values of $N$ a quadratic Stark effect is expected in all cases, but the induced electric polarization is discontinuous at those special magnetic fields. Experimental consequences for related nanostructures are discussed.

typos corrected, to appear Phys. Rev. B (Rapid Communication) 15 Aug

References in corpus (3)

• Spectroscopy of nanoscopic semiconductor rings
• Magnetic Field Dependent Tunneling in Glasses
• Correlated Persistent Tunneling Currents in Glasses

Cited by in corpus (5)

• Magnetic field effect on the dielectric constant of glasses: Evidence of disorder within tunneling barriers
• Order-disorder transition in nanoscopic semiconductor quantum rings
• Electron-acoustic-phonon scattering and electron relaxation in two-coupled quantum rings
• Coherent motion in the interaction model of cold glasses
• Isospin phases of vertically coupled double quantum rings under the influence of perpendicular magnetic fields