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

Q. Shi, M. A. Zudov, C. Morrison, M. Myronov

Research output: Contribution to journalArticle

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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.

Original languageEnglish (US)
Article number241303
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number24
DOIs
StatePublished - Jun 10 2015

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