Resistance fluctuations and Aharonov-Bohm-type oscillations in antidot arrays in the quantum Hall regime

Details Resistance fluctuations and Aharonov-Bohm-type oscillations in antidot arrays in the quantum Hall regime Resistance fluctuations and Aharonov-Bohm-type oscillations in antidot arrays in the quantum Hall regime

2008-06-10

arxiv.org/abs/0806.1559v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1143/JPSJ.77.093715

Resistance fluctuation phenomenon in antidot lattices in the quantum Hall regime are studied. Magnetoresistance of finite antidot array systems in the quantum Hall plateau transition regime exhibits two types of oscillatory effect. One is the aperiodic resistance fluctuations (RFs) and the other is the Aharonov-Bohm (AB)-type oscillations. Their dependences on the magnetic field and the gate voltage are quite distinct. While the aperiodic RFs are attributed to the complex evolution of the conducting network of compressible channels, the AB-type oscillations are interpreted in terms of edge states formed around individual antidots. The self-consistent screening effect is important for the both phenomenon, whereas, the single electron charging effect plays a minor role in the present case.

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