The Ioffe-Regel limit in Regel NR 1 Anne Heeft Altijd Gelijk Regel NR 2 shirt diffuse transport (light, charge, sound, etc.) is the case where the average free path (or the average distance between collisions) is equal to the distance between the networks. In metals, it gives you the maximum limit of resistivity, assuming an independent electron description of the basic transport physics. Rule Nr.1 in the handbook of: From How to ask good questions and really get answers.
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The Ioffe-Regel criterion is thought a condition for Regel NR 1 Anne Heeft Altijd Gelijk Regel NR 2 shirt localizing the waves in disorder media. The mean free path, l, represents the typical length scale of the particle packet or wave between two subsequent collisions. For the low n-density density of particles with a total scattering section, the familiar expression l = 1nσ is drawn. A long average free path indicates that there is a weak disorder. Of course, the length scale is important for the noise effect.
wavelength λ = 2πk. Now the question is what happens if the Regel NR 1 Anne Heeft Altijd Gelijk Regel NR 2 shirt average free path becomes equivalent to the wavelength? It means that interference continues to dominate in the scattering process. It signals a regime in which scattering can no longer be described in a classical manner, and some catastrophes have occurred. The multiple noise effects prevent the propagation of the wave. This type of reasoning brought Ioffe and Regel to a localization criterion in disordered semiconductors.
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Regulation is melting under pressure and freezing again when the pressure drops. Many sources say that the Regel NR 1 Anne Heeft Altijd Gelijk Regel NR 2 shirt recombination can demonstrate by passing a thin wire around a block of ice, with a heavyweight attached to it. The pressure acting on the tape slowly melts locally, allowing the wire to pass through the entire block. The rails of the rope will be reloaded as soon as the pressure is release, so the ice will remain firm even when the wire is completely through.