Figure 3
The surface energy spectrums of I-terminated (a), Te-terminated (b) surfaces of Bi3Te4I; and I-terminated (c), Te-terminated (d) surfaces of Bi4Te5I2.The Fermi level is set to the bulk valence band maximum and dotted lines in (a) and (b) denote various constant energy levels where spin textures are imaged. In (e)–(g) the spin-resolved constant energy contours are plotted for the I-terminated surface of Bi3Te4I, while those for the Te-terminated surface are shown in (h)–(j). The red and blue colors denote the positive and negative values of spin projections of Sx, Sy and Sz, respectively. The arrows label the spin polarizations of the outermost contour.
