Real-space renormalization group for the random-field Ising model

Дата и время публикации : 1993-04-29T18:19:28Z

Авторы публикации и институты :
M. E. J. Newman
B. W. Roberts
G. T. Barkema
J. P. Sethna

Ссылка на журнал-издание: Phys. Rev. B 48, 16533 (1993)
Коментарии к cтатье: 12 pages, CU-MSC-7576
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: We present real–space renormalization group (RG) calculations of the critical properties of the random–field Ising model on a cubic lattice in three dimensions. We calculate the RG flows in a two–parameter truncation of the Hamiltonian space. As predicted, the transition at finite randomness is controlled by a zero temperature, disordered critical fixed point, and we exhibit the universal crossover trajectory from the pure Ising critical point. We extract scaling fields and critical exponents, and study the distribution of barrier heights between states as a function of length scale.

Category: Physics