Parity Effects in Stacked Nanoscopic Quantum Rings

Details Parity Effects in Stacked Nanoscopic Quantum Rings Parity Effects in Stacked Nanoscopic Quantum Rings

2000-05-04

arxiv.org/abs/cond-mat/0005093v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

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

Scientific paper

10.1103/PhysRevB.62.R4813

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.

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