Herbertsmithite is one of the most extensively studied QSL candidate materials. It is a mineral with chemical composition ZnCu 3 (OH) 6 Cl 2 and a rhombohedral crystal structure. Notably, the copper ions within this structure form stacked two-dimensional layers of kagome lattices. Additionally, superexchange over the oxygen bonds creates a strong antiferromagnetic interaction between the S = 1 / 2 copper spins within a single layer, whereas coupling between layers is negligible. Therefore, it is a good realization of the antiferromagnetic spin-1/2 Heisenberg model on the kagome lattice, which is a prototypical theoretical example of a quantum spin liquid.