Unsaturated Bipartite Entanglement of a Spin-1/2 Ising-Heisenberg Model on a Triangulated Husimi Lattice |
| C. Ekiza, J. Strečkab
aFaculty of Science and Art, Aydın Adnan Menderes University, 09010 Aydın, Turkey bFaculty of Science, P.J. Šafárik University, Park Angelinum 9, 04001 Košice, Slovakia |
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| A bipartite entanglement between two nearest-neighbor Heisenberg spins of a spin-1/2 Ising-Heisenberg model on a triangulated Husimi lattice is quantified using a concurrence. It is shown that the concurrence equals zero in a classical ferromagnetic and a quantum disordered phase, while it becomes sizable though unsaturated in a quantum ferromagnetic phase. A thermally-assisted re-entrance of the concurrence is found above a classical ferromagnetic phase, whereas a quantum ferromagnetic phase displays a striking cusp of the concurrence at a critical temperature. |
DOI:10.12693/APhysPolA.137.592 topics: Ising-Heisenberg model, Husimi lattice, geometric frustration, entanglement |