title: 0.7 Structure and zero bias anomaly in ballistic hole quantum wires.
abstract: We study the anomalous conductance plateau around G=0.7(2e2/h) and the zero bias anomaly in ballistic hole quantum wires with respect to in-plane magnetic fields applied parallel B parallel and perpendicular B perpendicular to the quantum wire. As seen in electron quantum wires, the magnetic fields shift the 0.7 structure down to G=0.5(2e2/h) and simultaneously quench the zero bias anomaly. However, these effects are strongly dependent on the orientation of the magnetic field, owing to the highly anisotropic effective Landé g-factor g* in hole quantum wires. Our results highlight the fundamental role that spin plays in both the 0.7 structure and zero bias anomaly.
authors.affiliation: School of Physics, University of New South Wales, Sydney 2052, Australia. r.danneau@boojum.hut.fi
authors.forename: R
authors.initials: R
authors.lastname: Danneau
authors.forename: O
authors.initials: O
authors.lastname: Klochan
authors.forename: W R
authors.initials: WR
authors.lastname: Clarke
authors.forename: L H
authors.initials: LH
authors.lastname: Ho
authors.forename: A P
authors.initials: AP
authors.lastname: Micolich
authors.forename: M Y
authors.initials: MY
authors.lastname: Simmons
authors.forename: A R
authors.initials: AR
authors.lastname: Hamilton
authors.forename: M
authors.initials: M
authors.lastname: Pepper
authors.forename: D A
authors.initials: DA
authors.lastname: Ritchie