Tuning Band Alignment Using Interface Dipoles at the Pt/Anatase TiO₂ Interface.

Tachikawa, Takashi; Minohara, Makoto; Hikita, Yasuyuki; Bell, Christopher; Hwang, Harold Y · Adv Mater · 2015

basic_science · Level V

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Abstract

The Schottky barrier heights at the Pt/TiO2 (001) junctions are modulated over 0.8 eV by inserting <1 nm of LaAlO3. The large electric field in the LaAlO3 is stabilized by preserving the continuity of in-plane lattice symmetry at the oxide interface. These results greatly expand the application of dipole engineering to versatile polycrystalline metal/binary oxide functional interfaces.