Transport of fractional Hall quasiparticles through an antidot
arXiv:cond-mat/0701438 · doi:10.1103/PhysRevB.75.195332
Abstract
Current statistics of an antidot in the fractional quantum Hall regime is studied for Laughlin's series. The chiral Luttinger liquid picture of edge states with a renormalized interaction exponent is adopted. Several peculiar features are found in the sequential tunneling regime. On one side, current displays negative differential conductance and double-peak structures when . On the other side, universal sub-poissonian transport regimes are identified through an analysis of higher current moments. A comparison between Fano factor and skewness is proposed in order to clearly distinguish the charge of the carriers, regardless of possible non-universal interaction renormalizations. Super-poissonian statistics is obtained in the shot limit for , and plasmonic effects due to the finite-size antidot are tracked.
accepted for publication in Phys. Rev. B, references added