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Strong transport anisotropy in Ge/SiGe quantum wells in tilted magnetic fields
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Shi, Q., Zudov, M. A., Morrison, Christopher and Myronov, Maksym (2015) Strong transport anisotropy in Ge/SiGe quantum wells in tilted magnetic fields. Physical Review B (Condensed Matter and Materials Physics), 91 (20). pp. 1-5. 201301(R). doi:10.1103/PhysRevB.91.201301
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WRAP_0770428-px-100416-physrevb.91.201301.pdf - Published Version - Requires a PDF viewer. Download (825Kb) | Preview |
Official URL: http://dx.doi.org/10.1103/PhysRevB.91.201301
Abstract
We report on strong transport anisotropy in a two-dimensional hole gas in a Ge/SiGe quantum well, which emerges only when both perpendicular and in-plane magnetic fields are present. The ratio of resistances, measured along and perpendicular to the in-plane field, can exceed 3×104. The anisotropy occurs in a wide range of filling factors where it is determined primarily by the tilt angle. The lack of significant anisotropy without an in-plane field, easy tunability, and persistence to higher temperatures and filling factors set this anisotropy apart from nematic phases in GaAs/AlGaAs.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Anisotropy, Quantum wells | ||||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 1098-0121 | ||||||
| Official Date: | 8 May 2015 | ||||||
| Dates: |
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| Volume: | 91 | ||||||
| Number: | 20 | ||||||
| Number of Pages: | 5 | ||||||
| Page Range: | pp. 1-5 | ||||||
| Article Number: | 201301(R) | ||||||
| DOI: | 10.1103/PhysRevB.91.201301 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| 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) | ||||||
| Grant number: | ER 46640-SC0002567 (OBES), EP/J003263/1 (EPSRC), EP/J001074/1 (EPSRC), DMR-0654118 (NSF) |
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