Evidence for a spinon Fermi surface in the triangular S=1 quantum spin liquid Ba${}_3$NiSb${}_2$O${}_9$

B. Fak, S. Bieri, E. Canevet +7

Inelastic neutron scattering is used to study the low-energy magnetic excitations in the spin-1 triangular lattice of the 6H-B phase of Ba${}_3$NiSb${}_2$O${}_9$. We study two powder sam…