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Transport anisotropy in Ge quantum wells in the absence of quantum oscillations
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Shi, Q., Zudov, M. A., Morrison, Christopher and Myronov, Maksym (2015) Transport anisotropy in Ge quantum wells in the absence of quantum oscillations. Physical Review B (Condensed Matter and Materials Physics), 92 (16). pp. 1-5. 161405(R). doi:10.1103/PhysRevB.92.161405
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Official URL: http://dx.doi.org/10.1103/PhysRevB.92.161405
Abstract
A recent study of a high-mobility two-dimensional hole gas in a strained Ge quantum well revealed strong transport anisotropy in the quantum Hall regime when the magnetic field was tilted away from the sample normal [Q. Shi, M. A. Zudov, C. Morrison, and M. Myronov, Phys. Rev. B 91, 201301(R) (2015)]. In the present study we demonstrate that the anisotropy persists to such high temperatures and filling factors that quantum oscillations are no longer observed. This finding rules out the formation of a stripe phase as a possible origin for the observed anisotropy. However, we also show that the observed anisotropy is not consistent with other known anisotropies, such as those arising from finite-thickness effects or surface roughness.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||||
| Divisions: | Faculty of Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Quantum wells, Anisotropy | ||||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 1098-0121 | ||||||
| Official Date: | 14 October 2015 | ||||||
| Dates: |
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| Volume: | 92 | ||||||
| Number: | 16 | ||||||
| Number of Pages: | 5 | ||||||
| Page Range: | pp. 1-5 | ||||||
| Article Number: | 161405(R) | ||||||
| DOI: | 10.1103/PhysRevB.92.161405 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Funder: | United States. Department of Energy. Office of Basic Energy Sciences (OBES), Engineering and Physical Sciences Research Council (EPSRC), National Science Foundation (U.S.) (NSF), Florida | ||||||
| Grant number: | 46640 SC0002567 (OBES), EP/J003263/1 (EPSRC), EP/J001074/1 (EPSRC), DMR-0654118 (NSF) |
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