English

Multiple transitions in an infinite range p-spin random-crystal field Blume Capel model

Statistical Mechanics 2022-10-13 v1

Abstract

We study a pp-spin model with ferromagnetic coupling and quenched random-crystal fields for p3p \ge 3 for spin-1 systems. We find that the model has lines of first order transitions at finite temperature (T)(T) for all p3p \ge 3. For bimodal distribution of the random-crystal field these lines meet at a \emph{triple point} for weak strength of the crystal field (Δ)(\Delta). Beyond a critical strength of Δ\Delta, they do not meet and one of the lines ends at a \emph{critical point} (Tc)(T_c). Interestingly, we find that on increasing TT from TcT_c keeping other parameters fixed, the system undergoes one more transition which is first order in its character. The system thus exhibits a Gardner like transition for a range of parameters for all finite p3p \ge 3. For pp \to \infty the model behaves differently and there is only one random first order transition at T=0T = 0.

Keywords

Cite

@article{arxiv.2205.05877,
  title  = {Multiple transitions in an infinite range p-spin random-crystal field Blume Capel model},
  author = {Santanu Das and Sumedha},
  journal= {arXiv preprint arXiv:2205.05877},
  year   = {2022}
}
R2 v1 2026-06-24T11:15:02.404Z