Quantum tuning of magnetic phases in vanadium sulphide single crystals

Strongly correlated electron systems are known to host a variety of exotic phenomena and novel quantum phases. The transition-metal chalcogenide system, VxS8, is of particular interest, for it displays a wide range of behaviour on changing the stoichiometry, from a charge density wave metal (x=4) to an antiferromagnetic metal (x=5, 6) and even, a paramagnet metal (x=8). Here, we focus on V5S8, where we have observed that magnetic interactions between the vanadium d-electrons lead to an antiferromagnetic phase below 32K. We now propose to use the Wish instrument to explore the rich magnetic phase space available in this compound, by conducting a series of both powder and single-crystal neutron diffraction experiments at both zero and non-zero magnetic fields.