Charge-Spin Separation and the Spectral Properties of Luttinger Liquids

  • Johannes Voit
Part of the NATO ASI Series book series (NSSB, volume 343)


We compute the spectral function p(q, ω) of the one-dimensional Luttinger model. We discuss the distinct influences of charge-spin separation and of the anomalous dimensions of the fermion operators and their evolution with correlation strength. Charge-spin separation shows up in finite spectral weight at frequencies between υσ q and υp q where υ p and υσ are the velocities of charge and spin fluctuations, while spectral weight above υp q and below -υp q is generated by the hybridization of the Fermi surface at ±k F by interactions. There are nonuniversal power-law singularities at these spectral frequencies. We discuss the consistency of recent photoemission experiments on low-dimensional conductors with a Luttinger liquid picture which then would suggest very strong long range interactions.


Fermi Surface Spectral Function Anomalous Dimension Hubbard Model Spectral Weight 
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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Johannes Voit
    • 1
  1. 1.Institut Laue-LangevinGrenobleFrance

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