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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

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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, Engineering and Medicine > 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:
DateEvent
14 October 2015Published
8 June 2015Submitted
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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