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 [1 (1) over bar0] 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.
Published in:
Physical Review Letters 106,1 (2011)
Link to original published article:
http://dx.doi.org/10.1103/PhysRevLett.106.016804
Date of Version
January 2011
Recommended Citation
Koduvayur, S. P.; Lyanda-Geller, Y.; Khlebnikov, S.; Csathy, G.; Manfra, M. J.; Pfeiffer, L. N.; West, K. W.; and Rokhinson, L. P., "Effect of Strain on Stripe Phases in the Quantum Hall Regime" (2011). Department of Physics and Astronomy Faculty Publications. Paper 1270.
https://docs.lib.purdue.edu/physics_articles/1270