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Spinless composite fermions in an ultrahigh-quality strained Ge quantum well

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Shi, Q., Zudov, M. A., Morrison, Christopher and Myronov, Maksym (2015) Spinless composite fermions in an ultrahigh-quality strained Ge quantum well. Physical Review B (Condensed Matter and Materials Physics), 91 (24). pp. 1-4. 241303(R). doi:10.1103/PhysRevB.91.241303 ISSN 1098-0121.

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Official URL: http://dx.doi.org/10.1103/PhysRevB.91.241303

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Abstract

We report on an observation of a fractional quantum Hall effect in an ultrahigh-quality two-dimensional hole gas hosted in a strained Ge quantum well. The Hall resistance reveals precisely quantized plateaus and vanishing longitudinal resistance at filling factors ν=2/3,4/3, and 5/3. From the temperature dependence around ν=3/2 we obtain the composite fermion mass of m☆≈0.4me, where me is the mass of a free electron. Owing to large Zeeman energy, all observed states are spin polarized and can be described in terms of spinless composite fermions.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Fermions, Quantum Hall effect, Quantum wells
Journal or Publication Title: Physical Review B (Condensed Matter and Materials Physics)
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 10 June 2015
Dates:
DateEvent
10 June 2015Published
2015Accepted
5 April 2015Submitted
Volume: 91
Number: 24
Number of Pages: 4
Page Range: pp. 1-4
Article Number: 241303(R)
DOI: 10.1103/PhysRevB.91.241303
Status: Peer Reviewed
Publication Status: Published
Date of first compliant deposit: 18 April 2016
Date of first compliant Open Access: 18 April 2016
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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