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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
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 | ||||||||
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| 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: |
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| 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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