Anisotropy induced by impurities of “random local field” type in O(n) models and suppression of the Imry–Ma inhomogeneous state
It is shown that in a system with anisotropic distribution of the impurity-induced random local field directions in the n -dimensional space of a vector order parameter with the O ( n ) symmetry, the impurityinduced effective anisotropy arises for the space dimensionality 2 < d < 4. If the ani...
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Veröffentlicht in: | Physics of the solid state 2016-08, Vol.58 (8), p.1671-1674 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | It is shown that in a system with anisotropic distribution of the impurity-induced random local field directions in the
n
-dimensional space of a vector order parameter with the
O
(
n
) symmetry, the impurityinduced effective anisotropy arises for the space dimensionality 2 <
d
< 4. If the anisotropy constant exceeds the threshold value, then an inhomogeneous state predicted by Imry and Ma becomes energetically unfavorable, and the system goes back to a state with the long-range order. |
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ISSN: | 1063-7834 1090-6460 |
DOI: | 10.1134/S1063783416080059 |