Mean-field Renormalization Group Theory Research Articles

Mean field renormalization group: A theoretical approach to the Fe1−qAlq in the bcc lattice

In this work, the site diluted Heisenberg model is applied to study the magnetic properties of the bcc disordered phase of FeAl alloys by employing mean field renormalization group theory. We suggest a new approach to exchange interaction between nearest neighbors of Fe that depends on de powers of the Al (q) instead of the linear dependence proposed in other papers. Excellent agreement with the experimental data in the T – q plane have been obtained, in particular, in the region with anomalous behavior of the alloy concerned.

MFRG-DPIR study of spin- [formula omitted] Ising model with a random transverse field

A simple but effective approximate method combined by mean-field renormalization group theory (MFRG) and the discretized path-integral representation (DPIR) is used in studying the critical properties of S = 5 2 Ising model in a random transverse field (RTIM).

The critical properties of [formula omitted] Ising model with a transverse field

The phase diagram and the other critical properties of Ising model with s = 3 2 in a transverse field are investigated within the approximate scheme which is combined by mean-field renormalization group theory (MFRG) with the discretized path-integral representation (DPIR).

MFRG and DPIR for aS = 3/2 transverse ising model in a random field

A spin-3/2 transverse Ising model in a random field (RFTIM) is studied within the framework combined by mean-field renormalization group theory (MFRG) with the discretized pathintegral representation (DPIR). The phase diagrams and the other critical properties are investigated.

MFRG with DPIR for the disordered Ising model in a random transverse field

A simple but effective approximate scheme which is combined by mean field renormalization group theory (MFRG) [1, 2] with the discretized path-integral representation (DPIR [3–5] is employed in the study of the transverse random field Ising model (TRFIM). The critical properties of this kind of Ising system are calculated with this approximate scheme.

Mean Field Renormalization Group and Path‐Integral Methods for Spin‐One Disordered Ising Model in a Transverse Field

AbstractA new approximate scheme which is combined by mean field renormalization group theory (MFRG) with the discretized path‐integral renormalization (DPIR) is employed in the study of the disordered transverse Ising model. The critical properties of random bonds spin‐one Ising systems on a d‐dimensional lattice are calculated with this new approximate scheme.