Phys. Rev. Lett. 67, 1821–1824 (1991)Ordering and phase transitions in random-field Ising systemsReceived 23 May 1991; published in the issue dated 30 September 1991 An exact analysis of the Ising model with infinite-range interactions in a random field and a local mean-field theory in three dimensions is carried out leading to a phase diagram with several coexistence surfaces and lines of critical points. Our results show that the phase diagram depends crucially on whether the distribution of random fields is symmetric or not. Thus, Ising-like phase transitions in a porous medium (the asymmetric case) are in a different universality class from the conventional random-field model (symmetric case). © 1991 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.67.1821
DOI:
10.1103/PhysRevLett.67.1821
PACS:
05.50.+q, 64.70.Fx, 75.10.Hk
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.