Development and Application of Direct Fermi-Surface Mapping Method for Strongly Correlated Materials

费米面在强关联材料中具有重要的超导和磁性作用，作为新一代电子器件材料备受关注。在这项研究中，我们发展了康普顿散射技术作为一种直接观察费米面的方法，并将其应用于新型超导体。我们测量了钴酸盐、Fe-As材料和铜酸盐，并成功地绘制了在超导发生中起重要作用的载流子(空穴或电子)的费米面和轨道。

Fermi surface plays an important role on superconductivity and magnetism in strongly correlated materials which draws attention as next-generation materials for electronic devices. In this study, we have developed the Compton scattering technique as a direct observation method of Fermi surfaces and then applied to novel superconductors. We measured cobaltates, Fe-As materials and cuprates, and succeeded in mapping out the Fermi surfaces and orbitals of carriers (holes or electrons) which play an important role in the occurrence of superconductivity.