Quantum Beating in Ring Conductance: Observation of Spin Chiral States and Berry's phase

Details Quantum Beating in Ring Conductance: Observation of Spin Chiral States and Berry's phase Quantum Beating in Ring Conductance: Observation of Spin Chiral States and Berry's phase

2002-08-13

arxiv.org/abs/cond-mat/0208260v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

pdf-file, 4 figures attached, submitted to Physical Review Letters

Scientific paper

Using singly connected rings with a collimating contact to current leads, we have observed the spin quantum beating in the Aharonov-Bohm conductance oscillations. We demonstrate that the beating is a result of the superposition of two independent interference patterns associated with two orthogonal spin chiral states arising from intrinsic spin-orbit interactions. Our work provides the conclusive evidence of the spin Berry's phase in the conductance of quantum rings.

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