This title appears in the Scientific Report : 2019 

Electronic band structure of a two-dimensional oxide quasicrystal
Chiang, Cheng-Tien
Ellguth, Martin / Schumann, Florian O. / Tusche, Christian / Kraska, Richard / Förster, Stefan / Widdra, Wolf (Corresponding author)
Elektronische Eigenschaften; PGI-6
Physical review / B covering condensed matter and materials physics, 100 (2019) 12, S. 125149
Woodbury, NY Inst. 2019
10.1103/PhysRevB.100.125149
Journal Article
Controlling Spin-Based Phenomena
OpenAccess
OpenAccess
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.100.125149 in citations.
Please use the identifier: http://hdl.handle.net/2128/23399 in citations.
The valence band electronic structure of a BaTiO3-derived oxide quasicrystal (OQC) is studied by photoemission using momentum microscopy. An upward-dispersive O2p band is identified, and it can be assigned to a combination of in-plane orbitals according to the symmetry and the overlap of the wave functions. In addition, the signature of Ti3d states near the Fermi level is observed, which results in a metallic character of the OQC with 3d1 occupation. Our experiments reveal two-dimensional electronic states within the OQC based on a symmetry-adapted decomposition of photoelectron intensity distribution in the momentum space.