Inhomogeneous ground state and the coexistence of two length scales near phase transitions in real solids
Real crystals almost unavoidably contain a finite density of dislocations. We show that this generic type of long-range correlated disorder leads to a breakdown of the conventional scenario of critical behavior and standard renormalization group techniques based on the existence of a simple, homogen...
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Veröffentlicht in: | Europhysics letters 1999-01, Vol.45 (2), p.195-200 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Real crystals almost unavoidably contain a finite density of dislocations. We show that this generic type of long-range correlated disorder leads to a breakdown of the conventional scenario of critical behavior and standard renormalization group techniques based on the existence of a simple, homogeneous ground state. This breakdown is due to the appearance of an inhomogeneous ground state that changes the character of the phase transition to that of a percolative phenomenon. This scenario leads to a natural explanation for the appearance of two length scales in recent high resolution small-angle scattering experiments near magnetic and structural phase transitions. |
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ISSN: | 0295-5075 1286-4854 |
DOI: | 10.1209/epl/i1999-00146-1 |