Thermal entanglement of a geometrically frustrated spin-1 Heisenberg diamond cluster

TL;DR

This paper investigates how thermal entanglement persists in a frustrated spin-1 Heisenberg diamond cluster, providing exact analytical results that predict the robustness of entanglement in a specific nickel complex under temperature and magnetic field variations.

Contribution

It offers the first exact analytical analysis of thermal entanglement in a frustrated spin-1 Heisenberg diamond cluster, linking theoretical predictions to a real molecular complex.

Findings

Thermal entanglement remains robust against temperature increases.

Magnetic field influences the entanglement strength.

Exact analytical expressions for entanglement negativity are derived.

Abstract

Thermal entanglement of a geometrically frustrated spin-1 Heisenberg diamond cluster is examined within the framework of the exact diagonalization method by computing the measure of entanglement negativity. The calculated exact analytical results are applied in order to obtain theoretical prediction of the robustness of bipartite thermal entanglement of the tetranuclear nickel complex [Ni4(CO3)2(aetpy)8](ClO4)4 (aetpy = 2-aminoethyl-pyridine) against rising temperature and magnetic field.