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Magnetic field effects on low dimensional electron systems: Luttinger liquid behaviour in a quantum wire

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  • S. Bellucci
  • P. Onorato

Abstract

We discuss the effects of a strong magnetic field in quantum wires. We show how the presence of a magnetic field modifies the role played by electron electron interaction producing a strong reduction of the backward scattering corresponding to the Coulomb repulsion. We discuss the consequences of this and other effects of magnetic field on the Tomonaga-Luttinger liquids and especially on their power-law behaviour in all correlation functions. The focal point is the rescaling of all the repulsive terms of the interaction between electrons with opposite momenta, due to the edge localization of the electrons and to the reduction of the length scale. Because of the same two reasons there are some interesting effects of the magnetic field concerning the backward scattering due to the presence of one impurity and the corresponding conductance. As an effect of the magnetic field we find also a spin polarization induced by a combination of electrostatic forces and the Pauli principle, quite similar to the one observed in large Quntum Dots. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Suggested Citation

  • S. Bellucci & P. Onorato, 2005. "Magnetic field effects on low dimensional electron systems: Luttinger liquid behaviour in a quantum wire," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 45(1), pages 87-96, May.
    • Handle: RePEc:spr:eurphb:v:45:y:2005:i:1:p:87-96
    DOI: 10.1140/epjb/e2005-00167-6
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