講座內容：In this talk, Prof. Yokoya willintroduce Research Institute for Interdisciplinary Science (RIIS), OkayamaUniversity, and recent research about high-resolution holography studies ofheavily doped diamond. Searching superconductivity in materials composed oflight elements is one of strategies to discover high transition temperature (T_c) superconductivity. Dopeddiamond is one such candidate. Theoretically, a highT_cwas expected in heavily phosphorus(P)-doped diamondbecause of higher density of states of the conduction band compared to that ofthe valence band. However, P-doped diamond doesn’t show metallic behavior. Inorder to investigate this phenomenon, they use photoelectron holography toobserve the local structure of dopant P atoms. Prof. Yokoya will presenthigh-resolution photoelectron holography on heavily P-doped diamond and discussthe three dimensional local structures surrounding dopant P atoms indifferentchemical sites.