title: Luttinger-liquid behavior in weakly disordered quantum wires.
abstract: We have measured the temperature dependence of the conductance in long V-groove quantum wires fabricated in GaAs/AlGaAs heterostructures. Our data are consistent with recent theories developed within the framework of the Luttinger-liquid model, in the limit of weakly disordered wires. We show that, for the relatively low level of disorder in our quantum wires, the value of the interaction parameter g congruent with 0.66, which is the expected value for GaAs. However, samples with a higher level of disorder show conductance with stronger temperature dependence, which does not allow their treatment in the framework of perturbation theory. Fitting such data with perturbation-theory models leads inevitably to wrong (lower) values of g.
authors.affiliation: School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel. eyallevy@post.tau.ac.il
authors.forename: E
authors.initials: E
authors.lastname: Levy
authors.forename: A
authors.initials: A
authors.lastname: Tsukernik
authors.forename: M
authors.initials: M
authors.lastname: Karpovski
authors.forename: A
authors.initials: A
authors.lastname: Palevski
authors.forename: B
authors.initials: B
authors.lastname: Dwir
authors.forename: E
authors.initials: E
authors.lastname: Pelucchi
authors.forename: A
authors.initials: A
authors.lastname: Rudra
authors.forename: E
authors.initials: E
authors.lastname: Kapon
authors.forename: Y
authors.initials: Y
authors.lastname: Oreg