Figure 5

(a) MR vs. magnetic field plot for various currents. (b) Schematic of the band gap opening in TI due to TRS breaking. (c, d, e) shows the room temperature MOKE hysteresis loops of p-Si, Ni₈₀Fe₂₀ and Ni₈₀Fe₂₀/p-TlBiSe₂/p-Si, respectively. While the inset of (e) shows the cross–sectional view of Ni₈₀Fe₂₀/p-TlBiSe₂.