Nb₃Br₈ (Niobium Tribromide Cluster Compound)

Nb₃Br₈ is a van der Waals niobium-cluster bromide (same family as Nb₃Cl₈ and Nb₃I₈), a layered magnetic semiconductor/insulator. The Nb atoms form trimer (Nb₃) clusters arranged on a breathing kagome lattice, giving rise to cluster-based spin-singlet states and frustrated magnetism, accompanied by a temperature-driven magneto-structural transition (paramagnetic ↔ singlet). Its bands display kagome/flat-band features and it is regarded as a candidate obstructed atomic insulator.

Sample specifications: Individual crystals measure approximately 3 mm, with a purity of up to 99.9999% (6N), and multiple high-quality single-crystal pieces included in each package.