title: Spin-incoherent transport in quantum wires.
abstract: When a quantum wire is weakly confined, a conductance plateau appears at e;{2}/h with decreasing carrier density in zero magnetic field accompanied by a gradual suppression of the 2e;{2}/h plateau. Applying an in-plane magnetic field B_{ parallel} does not alter the value of this quantization; however, the e;{2}/h plateau weakens with increasing B_{ parallel} up to 9 T, and then strengthens on further increasing B_{ parallel}, which also restores the 2e;{2}/h plateau. Our results are consistent with spin-incoherent transport in a one-dimensional wire.
authors.affiliation: Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors.forename: W K
authors.initials: WK
authors.lastname: Hew
authors.forename: K J
authors.initials: KJ
authors.lastname: Thomas
authors.forename: M
authors.initials: M
authors.lastname: Pepper
authors.forename: I
authors.initials: I
authors.lastname: Farrer
authors.forename: D
authors.initials: D
authors.lastname: Anderson
authors.forename: G A C
authors.initials: GA
authors.lastname: Jones
authors.forename: D A
authors.initials: DA
authors.lastname: Ritchie