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Phys. Rev. Lett. 95, 136803 (2005)

Quasiparticle Tunneling through a Barrier in the Fractional Quantum Hall Regime

Elad Shopen,1 Yuval Gefen,2 and Yigal Meir1,3

1Department of Physics, Ben-Gurion University, Beer-Sheva 84105, Israel
2Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
3The Ilse Katz Center for Meso- and Nano-Scale Science and Technology, Ben-Gurion University, Beer-Sheva 84105, Israel

(Received 7 April 2005; published 22 September 2005)

Tunneling of fractionally charged quasiparticles (QPs) through a barrier is considered in the context of a multiply connected geometry. In this geometry global constraints do not prohibit such a tunneling process. The tunneling amplitude is evaluated and the crossover from mesoscopic QP-dominated to electron-dominated tunneling as the system's size is increased is found. The presence of disorder enhances both electron and QP-tunneling rates.
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