Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.016804
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Funding
- EPSRC [EP/H017313/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H017313/1] Funding Source: researchfish
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0907172] Funding Source: National Science Foundation
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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.
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