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Charge Fractionalization in Non-Chiral Luttinger Systems

Le Hur, Karyn ; Halperin, Bertrand ; Yacoby, Amir

Elsevier 2008

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  • Título:
    Charge Fractionalization in Non-Chiral Luttinger Systems
  • Autor: Le Hur, Karyn ; Halperin, Bertrand ; Yacoby, Amir
  • Assuntos: charge fractionalization ; nonchiral Luttinger liquids ; transport
  • Notas: Annals of Physics
    http://dx.doi.org/10.1016/j.aop.2008.04.006
    http://arxiv.org/abs/0803.0744v2
  • Descrição: One-dimensional metals, such as quantum wires or carbon nanotubes, can carry charge in arbitrary units, smaller or larger than a single electron charge. However, according to Luttinger theory, which describes the low-energy excitations of such systems, when a single electron is injected by tunneling into the middle of such a wire, it will tend to break up into separate charge pulses, moving in opposite directions, which carry definite fractions f and (1-f) of the electron charge, determined by a parameter g that measures the strength of charge interactions in the wire. (The injected electron will also produce a spin excitation, which will travel at a different velocity than the charge excitations.) Observing charge fractionalization physics in an experiment is a challenge in those (nonchiral) low-dimensional systems which are adiabatically coupled to Fermi liquid leads. We theoretically discuss a first important step towards the observation of charge fractionalization in quantum wires based on momentum-resolved tunneling and multi-terminal geometries, and explain the recent experimental results of Steinberg et al. [H. Steinberg, G. Barak, A. Yacoby, L.N. Pfeiffer, K.W. West, B.I. Halperin, K. Le Hur, Nature Physics 4 (2008) 116].
  • Editor: Elsevier
  • Data de criação/publicação: 2008
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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