Aharonov-Bohm Oscillations with Spin: Evidence for Berry's Phase

Details Aharonov-Bohm Oscillations with Spin: Evidence for Berry's Phase Aharonov-Bohm Oscillations with Spin: Evidence for Berry's Phase

2002-02-27

arxiv.org/abs/cond-mat/0202516v1

Physical Review Letters 88, 146801 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

To be published in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.88.146801

We report a study of the Aharonov-Bohm effect, the oscillations of the resistance of a mesoscopic ring as a function of a perpendicular magnetic field, in a GaAs two-dimensional hole system with a strong spin-orbit interaction. The Fourier spectra of the oscillations reveal extra structure near the main peak whose frequency corresponds to the magnetic flux enclosed by the ring. A comparison of the experimental data with results of simulations demonstrates that the origin of the extra structure is the geometric (Berry) phase acquired by the carrier spin as it travels around the ring.

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