title: Magnetoresistance anisotropy in Si /SiGe in tilted magnetic fields: experimental evidence for a stripe-phase formation.
abstract: We observe pronounced transport anisotropies in magnetotransport experiments performed in the two-dimensional electron system of a Si/SiGe heterostructure. They occur when an in-plane field is used to tune two Landau levels with opposite spin to energetic coincidence. The observed anisotropies disappear drastically for temperatures above 1 K. We propose that our experimental findings may be caused by the formation of a unidirectional stripe phase oriented perpendicular to the in-plane field.
authors.affiliation: Institut für Festkörperphysik, Universität Hannover, Germany. zeitler@nano.uni-hannover.de
authors.forename: U
authors.initials: U
authors.lastname: Zeitler
authors.forename: H W
authors.initials: HW
authors.lastname: Schumacher
authors.forename: A G
authors.initials: AG
authors.lastname: Jansen
authors.forename: R J
authors.initials: RJ
authors.lastname: Haug