Disordered 1D conductors

  • G. Grüner
  • A. Jánossy
  • K. Holczer
  • G. Mihály
7. Disorder
Part of the Lecture Notes in Physics book series (LNP, volume 96)


We tried to demonstrate in this paper, that there is a wide class of organic 1D conductors where disorder plays an important role and leads to the same overall transport and magnetic properties. There is no evidence for sharp phase transitions and various properties suggest the absence of long range order at low temperatures. The dense set of random potentials does not destroy the long range coherence of the electronic wave functions which may be of the order of 100 lattice constants. The measured static dielectric constant is in contrast with models suggesting a smooth metal-insulator transition and also with the assumption that disorder is strong and the localization length is small. A phenomenological description of ε(T) indicates coherent charge transport along the chains, this can be related to CDW-s pinned by impurities. Large impurity barriers have an effect which is different from that of the inherent disorder; they destroy the long range coherence and the coherence length becomes equal to the average distance between the impurities. Disordered materials appear to be as sensitive to small defect concentrations as ordered 1D conductors like TTF-TCNQ.


Dielectric Constant Coherence Length Localization Length Random Potential Strong Disorder 
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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • G. Grüner
    • 1
  • A. Jánossy
    • 1
  • K. Holczer
    • 1
  • G. Mihály
    • 1
  1. 1.Central Research Institute for PhysicsBudapestHungary

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