title: Effect of spin-orbit interactions on the 0.7 anomaly in quantum point contacts.
abstract: We study how the conductance of a quantum point contact is affected by spin-orbit interactions, for systems at zero temperature both with and without electron-electron interactions. In the presence of spin-orbit coupling, tuning the strength and direction of an external magnetic field can change the dispersion relation and hence the local density of states in the point contact region. This modifies the effect of electron-electron interactions, implying striking changes in the shape of the 0.7-anomaly and introducing additional distinctive features in the first conductance step.
authors.affiliation: Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität, Theresienstraße 37, 80333 Munich, Germany and Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA.
authors.forename: Olga
authors.initials: O
authors.lastname: Goulko
authors.affiliation: Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität, Theresienstraße 37, 80333 Munich, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Bauer
authors.affiliation: Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität, Theresienstraße 37, 80333 Munich, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Heyder
authors.affiliation: Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität, Theresienstraße 37, 80333 Munich, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: von Delft