Ground state and far-infrared absorption of two-electron rings in a magnetic field

Details Ground state and far-infrared absorption of two-electron rings in a magnetic field Ground state and far-infrared absorption of two-electron rings in a magnetic field

2001-01-11

arxiv.org/abs/cond-mat/0101163v1

PRB 63, 125334 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

RevTeX (PRB accepted), 5 embedded + 6 GIF-file figures

Scientific paper

10.1103/PhysRevB.63.125334

Motivated by recent experiments [A. Lorke {\em et al.}, Phys. Rev. Lett.\ {\bf 84}, 2223 (2000)] an analysis of the ground state and far-infrared absorption of two electrons confined in a quantum ring is presented. The height of the repulsive central barrier in the confining potential is shown to influence in an important way the ring properties. The experiments are best explained assuming the presence of both high- and low-barrier quantum rings in the sample. The formation of a two-electron Wigner molecule in certain cases is discussed.

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