Interface roughening in random field models

  • Thomas Nattermann
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 206)


In the present paper a first attempt to a statistical mechanics of interface roughening in random systems has been outlined. It proved to be difficult to obtain exact results even for weakly disordered systems such that crude approximations had to be used. The origin of these difficulties is that the interface is anon-local object: its shape and energy depends on the precise arrangement of the RFs (or the impurities) even if they are very distant. Therefore, the interface adopts shapes, that are unfavourable locally in order to minimize its total (free) energy. This has its mathematical correpondence in the non-analytic dependence of the thermodynamic quantities on h 2 0 (or the impurity concentration), which seems to rule out straight-forward perturbation expansions (and eventually also the replica method). The approach in its present form is still to crude to determine bulk critical properties or the nature of the roughening transition. Thus, both from a physical and a methodological point of view,further attempts in this field seem to be of interest.


Domain Wall Random Field Capillary Wave Disorder Strength Soliton Lattice 


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Copyright information

© Springer-Verlag 1984

Authors and Affiliations

  • Thomas Nattermann
    • 1
  1. 1.Sektion Physik der Humboldt-UniversitätBerlinDDR

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