Chiral anomaly induced negative magnetoresistance and weak anti-localization in Weyl semimetal Bi_0.97Sb_0.03 alloy

Experimental access to massless Weyl fermions through topological materials promises substantial technological ramifications. Here, we report magneto-transport properties of Bi 1− x Sb x alloy near the quantum critical point x = 3% and 3.5%. The two compositions that are synthesized and studied are single crystals of Bi 0.97 Sb 0.03 and Bi 0.965 Sb 0.035 . We observe a transition from semimetal to semiconductor with the application of magnetic...