Weak antilocalization effect due to topological surface states in Bi${}_2$Se${}_{2.1}$Te${}_{0.9}$

K. Shrestha, D. Graf, V. Marinova +2

We have investigated the weak antilocalization (WAL) effect in the p-type Bi${}_2$Se${}_{2.1}$Te${}_{0.9}$ topological system. The magnetoconductance shows a cusp-like feature at low mag…