The 155th AMCP Open Seminar

Tuesday, June 23, 2020, 15:00-16:00

National Institute for Materials Science (NIMS)
Sengen Main Bldg. 8F Middle Seminar Room 
※Non-NIMS staff can only participate online.

Pre-registration is not required.
For inquiries, please contact the Administrative Office.
This lecture is open to the public. Your participation is strongly encouraged.

For online participation, please apply by email to the Administration Office by the day before.
※Audio and video recordings are prohibited.

TSUDA Shunsuke, Senior Researcher, Synchrotron X-ray Group

Hard X-ray photoemission study of functional materials

In this talk, I will present my spectroscopic studies on functional materials. Ca₃Ru₂O₇ shows metallic electronic conduction down to low temperature. After very small amount of substitution of the Ru site by Ti, it shows metal-insulator transition at structural transition temperature. From hard-X-ray photoemission study (HAXPES), we found the most probable origin of the transition is a Mott transition. Because of the similarity to cuprate superconductors, Ba₂IrO₄, which is a representative spin-orbit Mott insulator, is expected as a platform for novel superconductivity. In this study, from HAXPES, we evaluated the electronic evolution induced by carrier doping of through K (hole) or La (electron) doping.