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Tunneling into Fractional Quantum Hall Edge States

Speaker: Smitha Vishveshwara, University of Illinois
Date & Time: September 19, 2006 - 1:30pm
Location: Serin 385E

Tunneling into Fractional Quantum Hall Edge States
Physics and Astronomy

Smitha Vishveshwara
University of Illinois
Serin 385E 1:30pm

The properties of a two-dimensional electron gas in the quantum Hall regime can be probed through tunneling measurements performed at its edges. Here, the signatures of two such properties are discussed. The first is the possibility of having a transition in the spin structure of quantum Hall states at certain fillings. It is found that tunneling between a quantum Hall edge state and a superconducting lead can act as a means of detecting such a transition. The second is the bizarre property of fractional statistics attributed to quantum Hall quasiparticles. It is shown that tunneling between three edge states can be used to observe signatures of fractional statistics.

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