Tunneling in Fractional Quantum Hall line junctions

Details Tunneling in Fractional Quantum Hall line junctions Tunneling in Fractional Quantum Hall line junctions

2005-02-03

arxiv.org/abs/cond-mat/0502092v1

Physical Review B 72 (2005) 085318

Physics

Condensed Matter

Other Condensed Matter

7 pages, RevTex, 12 figs, submitted to Phys Rev B

Scientific paper

10.1103/PhysRevB.72.085318

We study the tunneling current between two counterpropagating edge modes described by chiral Luttinger liquids when the tunneling takes place along an extended region. We compute this current perturbatively by using a tunnel Hamiltonian. Our results apply to the case of a pair of different two-dimensional electron gases in the fractional quantum Hall regime separated by a barrier, e. g. electron tunneling. We also discuss the case of strong interactions between the edges, leading to nonuniversal exponents even in the case of integer quantum Hall edges. In addition to the expected nonlinearities due to the Luttinger properties of the edges, there are additional interference patterns due to the finite length of the barrier.

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