Nonlinear spectra of spinons and holons in short GaAs quantum wires

Research output: Contribution to journalArticle

Authors

  • M Moreno
  • C. J. B. Ford
  • Y. Jin
  • J. P. Griffiths
  • I Farrer
  • G. A. C. Jones
  • David A. Ritchie

External organisations

  • Cavendish Laboratory
  • University of Cambridge

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.

Details

Original languageEnglish
Article number12784
Number of pages8
JournalNature Communications
Volume7
Publication statusPublished - 15 Sep 2016

ASJC Scopus subject areas