Magnetism and Strange Metal in V-Doped WSe₂

Doping insulators can induce exotic physic phenomena such as metal-insulator transition, magnetism, and superconductivity. It is interesting to revisit the doping strategy in the semiconducting transition metal dichalcogenides, in particular the hole regime with the strong spin-orbit coupling of their valence bands. In this talk, we will present the appearance of a long-range magnetic order and the strange metal characteristics in V-doped WSe₂ at different ranges of doping concentration. At low doing regime, the long-range ferromagnetic order is confirmed by a hysteresis lope of magnetoresistance, maintaining up to 400K (limited by our capabilities of measurement). At high doing regime, the linear relation between resistance and temperature is manifested from 150K down to 150mK. The mechanism underlying the strange metal will be discussed and compared to the cuprate system. The transition from magnetism to strange metal indicates the rich of unexplored physic phenomenon at two-dimensional system in doped transition metal dichalcogenides.