Possible line of critical points for a random field Ising model in dimension 2
نویسندگان
چکیده
منابع مشابه
Possible line of critical points for a random field Ising model in dimension 2
2014 We study a particular random field Ising model in dimension 2 at 0 temperature. On each site the random field is either + ~ with probability p/2, ~ with probability p/2 or 0 with probability 1 2014 p. Using finite size scaling arguments, we show that for small p, the average correlation function between two spins at distance R decreases like R-~(p) where the exponent ~(p) = 2 03C0p + O(p2)...
متن کاملRandom Field Ising Model
This paper gives an introduction to the Random Field Ising Model (RFIM). Since its rst discussion in the paper by Imry and Ma 1] there has been great interest in this model, since Ising or Ising-like systems in random elds are a good representation of a large number of impure materials. These show features that can not be understood by studying ideal systems (i.e. Ising model). There are a lot ...
متن کاملCritical behavior of the random-field Ising model.
We study the critical properties of the random field Ising model in general dimension d using hightemperature expansions for the susceptibility, χ=∑j[〈σiσj⟩T-〈σi⟩T〈σj⟩T]h and the structure factor, G=∑j[〈σiσj⟩T]h, where 〈⟩T indicates a canonical average at temperature T for an arbitrary configuration of random fields and [ ]h indicates an average over random fields. We treated two distributions ...
متن کاملCritical aspects of the random-field Ising model
We investigate the critical behavior of the three-dimensional random-field Ising model (RFIM) with a Gaussian field distribution at zero temperature. By implementing a computational approach that maps the ground-state of the RFIM to the maximum-flow optimization problem of a network, we simulate large ensembles of disorder realizations of the model for a broad range of values of the disorder st...
متن کاملDepinning transition of a driven interface in the random-field Ising model around the upper critical dimension.
We investigate the depinning transition for driven interfaces in the random-field Ising model for various dimensions. We consider the order parameter as a function of the control parameter (driving field) and examine the effect of thermal fluctuations. Although thermal fluctuations drive the system away from criticality, the order parameter obeys a certain scaling law for sufficiently low tempe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal de Physique Lettres
سال: 1984
ISSN: 0302-072X
DOI: 10.1051/jphyslet:019840045012057700