Anisotropy Induced by Impurities of "Random Local Field" Type in O(n) Models and Suppression of the Imry-Ma Inhomogeneous State

作者：Berzin A A; Morosov A I^*; Sigov A S

来源：Physics of the Solid State, 2016, 58(8): 1671-1674.

DOI：10.1134/S1063783416080059

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 impurity-induced 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.

• 出版日期2016-8