Fig. 3.

ARPES of the electronic structure at SrTiO₃(110)-(4 × 1). (A–D) Energy-momentum intensity maps (, ) along the (or [001]) direction and the (or ) direction, respectively. (E–H) Corresponding second derivatives. In each direction, the spectra were measured with linear vertical (A and D) and linear horizontal (B and C) polarized light. Tight-binding fits are overlaid for both directions. The -like bands are drawn in blue and the -like bands in red. The -derived bands are weakly dispersive and -derived bands are strongly dispersive along [001]; the -derived bands become weakly dispersive and -derived band becomes strongly dispersive along . The subbands become more visible in E–H.