Structural and Dynamical Aspects of the Charge Density Wave Instability

  • J. P. Pouget
Part of the NATO ASI Series book series (NSSB, volume 354)

Abstract

It was shown more than 40 years ago that a half-filled one-dimensional (1D) metal submitted either to a dimerization of its ionic periodicity (Peierls 1955) or to an antiferro-magnetic ordering of its electronic spins (Slater 1951) undergoes a transition towards a non conducting ground state. More generally it is now proved that such a gap opening occurs if a lattice or a spin modulation introduces the periodicity 2π/2kF in the structure, where 2kF is twice the Fermi wave vector of the 1D electron gas. These ground states, where either the charge or the spin density is modulated, are now observed in many metals exhibiting anisotropic electronic properties. These modulations are called charge or spin density waves, following the general concept introduced by Overhauser (1962).

Keywords

Anisotropy Tungsten Coherence SilT Phen 

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Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • J. P. Pouget
    • 1
  1. 1.Laboratoire de Physique des Solides (CNRS URA 02)Université de Paris SudOrsay CedexFrance

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