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

Article English OPEN
Shi, Q. ; Zudov, M. A. ; Morrison, Christopher ; Myronov, Maksym (2015)
  • Publisher: American Physical Society
  • Related identifiers: doi: 10.1103/PhysRevB.91.241303
  • Subject: QC
    arxiv: Condensed Matter::Mesoscopic Systems and Quantum Hall Effect

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.
  • References (40)
    40 references, page 1 of 4

    Q. Shi,1 M. A. Zudov,1,* C. Morrison,2 and M. Myronov2

    1School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA

    2Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom

    (Received 5 May 2015; revised manuscript received 25 May 2015; published 10 June 2015) [1] D. C. Tsui, H. L. Stormer, and A. C. Gossard, Phys. Rev. B 25,

    1405 (1982). [2] S. F. Nelson, K. Ismail, J. J. Nocera, F. F. Fang, E. E. Mendez,

    J. O. Chu, and B. S. Meyerson, Appl. Phys. Lett. 61, 64 (1992). [3] E. P. De Poortere, Y. P. Shkolnikov, E. Tutuc, S. J. Papadakis,

    M. Shayegan, E. Palm, and T. Murphy, Appl. Phys. Lett. 80,

    1583 (2002). [4] K. Lai, W. Pan, D. C. Tsui, S. Lyon, M. Mu¨hlberger, and

    F. Scha¨ffler, Phys. Rev. Lett. 93, 156805 (2004). [5] B. A. Piot, J. Kunc, M. Potemski, D. K. Maude, C. Bet-

    Phys. Rev. B 82, 081307 (2010). [6] T. M. Kott, B. Hu, S. H. Brown, and B. E. Kane, Phys. Rev. B

  • Similar Research Results (1)
  • Metrics
    0
    views in OpenAIRE
    0
    views in local repository
    13
    downloads in local repository

    The information is available from the following content providers:

    From Number Of Views Number Of Downloads
    Warwick Research Archives Portal Repository - IRUS-UK 0 13