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Nonlinear spectra of spinons and holons in short GaAs quantum wires

Author

Listed:
  • M Moreno

    (Cavendish Laboratory, University of Cambridge)

  • C. J. B. Ford

    (Cavendish Laboratory, University of Cambridge)

  • Y. Jin

    (Cavendish Laboratory, University of Cambridge)

  • J. P. Griffiths

    (Cavendish Laboratory, University of Cambridge)

  • I. Farrer

    (Cavendish Laboratory, University of Cambridge
    Present address: Department of Electronic & Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK)

  • G. A. C. Jones

    (Cavendish Laboratory, University of Cambridge)

  • D. A. Ritchie

    (Cavendish Laboratory, University of Cambridge)

  • O. Tsyplyatyev

    (School of Physics and Astronomy, University of Birmingham
    Present address: Institut für Theoretische Physik, Universität Frankfurt, Max-von-Laue Strasse 1, 60438 Frankfurt, Germany)

  • A. J. Schofield

    (School of Physics and Astronomy, University of Birmingham)

Abstract

One-dimensional electronic fluids are peculiar conducting systems, where the fundamental role of interactions leads to exotic, emergent phenomena, such as spin-charge (spinon-holon) separation. The distinct low-energy properties of these 1D metals are successfully described within the theory of linear Luttinger liquids, but the challenging task of describing their high-energy nonlinear properties has long remained elusive. Recently, novel theoretical approaches accounting for nonlinearity have been developed, yet the rich phenomenology that they predict remains barely explored experimentally. Here, we probe the nonlinear spectral characteristics of short GaAs quantum wires by tunnelling spectroscopy, using an advanced device consisting of 6000 wires. We find evidence for the existence of an inverted (spinon) shadow band in the main region of the particle sector, one of the central predictions of the new nonlinear theories. A (holon) band with reduced effective mass is clearly visible in the particle sector at high energies.

Suggested Citation

  • M Moreno & C. J. B. Ford & Y. Jin & J. P. Griffiths & I. Farrer & G. A. C. Jones & D. A. Ritchie & O. Tsyplyatyev & A. J. Schofield, 2016. "Nonlinear spectra of spinons and holons in short GaAs quantum wires," Nature Communications, Nature, vol. 7(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12784
    DOI: 10.1038/ncomms12784
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