Figure 1
From: Strain-modulated ferromagnetism and band gap of Mn doped Bi2Se3

Energetics and magnetic behavior of Mn doped Bi2Se3 under strain.
(a) A 2 × 2 × 1 supercell of 6QLs Bi2Se3 used in the calculation. (b) Only 1 of 6QLs is used to clarity the doped configurations. One Mn is fixed at O and the others move from A to B. (c) Total energies relative to the case without strain versus in-plane and out-of-plane strains. (d) Moments versus in-plane and out-of-plane strains.