Reentrant transitions of Ising-Heisenberg ferromagnet on a triangular lattice with diamond-like decorations

TL;DR

This paper investigates the critical behavior of a mixed spin-1/2 and spin-1 Ising-Heisenberg ferromagnet on a decorated triangular lattice, revealing complex reentrant phase transitions due to diamond-like decorations.

Contribution

It provides an exact analysis of how diamond-like decorations induce reentrant phase transitions in the Ising-Heisenberg model on a triangular lattice.

Findings

Reentrant phase transitions with two critical points identified.

Decoration with Heisenberg spins significantly alters critical behavior.

Exact solution via decoration-iteration mapping transformation.

Abstract

The mixed spin-1/2 and spin-1 Ising-Heisenberg ferromagnet on the decorated triangular lattice consisting of inter-connected diamonds is investigated within the framework of an exact decoration-iteration mapping transformation. It is shown that the diamond-like decoration by a couple of the Heisenberg spins gives rise to a diverse critical behaviour including reentrant phase transitions with two consecutive critical points.