title: Effect of strain on stripe phases in the quantum Hall regime.
abstract: Preferential orientation of the stripe phases in the quantum Hall (QH) regime has remained a puzzle since its discovery. We show experimentally and theoretically that the direction of high and low resistance of the two-dimensional (2D) hole gas in the QH regime can be controlled by an external strain. Depending on the sign of the in-plane shear strain, the Hartree-Fock energy of holes or electrons is minimized when the charge density wave (CDW) is oriented along the [110] or [110] directions. We suggest that shear strains due to internal electric fields in the growth direction are responsible for the observed orientation of CDW in pristine electron and hole samples.
authors.affiliation: Department of Physics and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: Sunanda P
authors.initials: SP
authors.lastname: Koduvayur
authors.forename: Yuli
authors.initials: Y
authors.lastname: Lyanda-Geller
authors.forename: Sergei
authors.initials: S
authors.lastname: Khlebnikov
authors.forename: Gabor
authors.initials: G
authors.lastname: Csathy
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Manfra
authors.forename: Loren N
authors.initials: LN
authors.lastname: Pfeiffer
authors.forename: Kenneth W
authors.initials: KW
authors.lastname: West
authors.forename: Leonid P
authors.initials: LP
authors.lastname: Rokhinson