Effect of Strain on Stripe Phases in the Quantum Hall Regime
Date of this Version
1-7-2011Citation
Sunanda P. Koduvayur, Yuli Lyanda-Geller, Sergei Khlebnikov, Gabor Csathy, Michael J. Manfra, Loren N. Pfeiffer, Kenneth W. West, and Leonid P. Rokhinson Phys. Rev. Lett. 106, 016804 – Published 7 January 2011
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.
Discipline(s)
Nanoscience and Nanotechnology
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Comments
This is the published version of Sunanda P. Koduvayur, Yuli Lyanda-Geller, Sergei Khlebnikov, Gabor Csathy, Michael J. Manfra, Loren N. Pfeiffer, Kenneth W. West, and Leonid P. Rokhinson. (7 January 2011). "Effect of Strain on Stripe Phases in the Quantum Hall Regime". First published in the Physical Review Letters and is available online at: https://doi.org/10.1103/PhysRevLett.106.016804