Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1997-03-28
Phys. Rev. Lett. 80, 141 (1998)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 1 EPS figure, RevTeX, epsfig
Scientific paper
10.1103/PhysRevLett.80.141
We present a composite fermion theory of tunneling into the edge of a compressible quantum Hall system. The tunneling conductance is non-ohmic, due to slow relaxation of electromagnetic and Chern-Simons field disturbances caused by the tunneling electron. Universal results are obtained in the limit of a large number of channels involved in the relaxation. The tunneling exponent is found to be a continuous function of the filling factor nu, with a a slope that is discontinuous at nu=1/2 in the limit of vanishing bulk resistivity rho_xx. When nu corresponds to a principal fractional quantized Hall state, our results agree with the chiral Luttinger liquid theories of Wen, and Kane, Fisher and Polchinski.
Halperin Bertrand I.
Levitov Leonid S.
Shytov Andrey V.
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