Weak-Localization in Chaotic Versus Non-Chaotic Cavities: A Striking Difference in the Line Shape

Details Weak-Localization in Chaotic Versus Non-Chaotic Cavities: A Striking Difference in the Line Shape Weak-Localization in Chaotic Versus Non-Chaotic Cavities: A Striking Difference in the Line Shape

1994-05-26

arxiv.org/abs/cond-mat/9405077v1

Physics

Condensed Matter

4 pages revtex + 4 figures on request; amc.hub.94.1

Scientific paper

10.1103/PhysRevLett.73.2111

We report experimental evidence that chaotic and non-chaotic scattering through ballistic cavities display distinct signatures in quantum transport. In the case of non-chaotic cavities, we observe a linear decrease in the average resistance with magnetic field which contrasts markedly with a Lorentzian behavior for a chaotic cavity. This difference in line-shape of the weak-localization peak is related to the differing distribution of areas enclosed by electron trajectories. In addition, periodic oscillations are observed which are probably associated with the Aharonov-Bohm effect through a periodic orbit within the cavities.

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