title: Plateau Behavior in the Chiral Luttinger Liquid Exponent.
abstract: The current-voltage power law exponent, alpha, for electron tunneling into chiral Luttinger liquids at the fractional quantum Hall edge is found to exhibit a plateaulike structure at alpha close to 3 as the filling factor, nu, is varied. The presence of a plateau near alpha = 3 strongly suggests a fundamental connection between alpha and the structure of the underlying quantum ground states associated with the robust incompressible nu = 1/3 Hall fluid. However, the position in the inverse filling factor where the plateau occurs can vary between samples and appears shifted to values higher than expected from theory.
authors.affiliation: Department of Physics, Purdue University, West Lafayette, Indiana 47907 and National Tsing-Hua University, 101 Kuang-Fu Road, Section 2, Hsin-Chu, Taiwan, Republic of China.
authors.initials: AM
authors.lastname: Chang
authors.initials: MK
authors.lastname: Wu
authors.initials: CC
authors.lastname: Chi
authors.initials: LN
authors.lastname: Pfeiffer
authors.initials: KW
authors.lastname: West