Characteristic molecular properties of one-electron double quantum rings under magnetic fields

Details Characteristic molecular properties of one-electron double quantum rings under magnetic fields Characteristic molecular properties of one-electron double quantum rings under magnetic fields

2007-12-03

arxiv.org/abs/0712.0224v1

J. Phys.: Condens. Matter 20 (2008) 035212

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages (iopart format), 10 figures, accepted in J.Phys.Cond.Matt

Scientific paper

10.1088/0953-8984/20/03/035212

The molecular states of conduction electrons in laterally coupled quantum rings are investigated theoretically. The states are shown to have a distinct magnetic field dependence, which gives rise to periodic fluctuations of the tunnel splitting and ring angular momentum in the vicinity of the ground state crossings. The origin of these effects can be traced back to the Aharonov-Bohm oscillations of the energy levels, along with the quantum mechanical tunneling between the rings. We propose a setup using double quantum rings which shows that Aharonov-Bohm effects can be observed even if the net magnetic flux trapped by the carriers is zero.

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