High-resolution angle-resolved photoemission study of fine electronic states in electron-doped high-T_c superconductors

点击翻译按钮获取中文摘要

In order to elucidate the origin of superconductivity in high-T_c cuprates, it is indispensable to systematically investigate the electronic states of various superconductors and compare their electronic states with cuprates. Recently-discovered iron-pnictide superconductor is the best candidate to approach this issue. In this research, we have performed high-resolution angle-resolved photoemission spectroscopy of iron-pnictide superconductors and elucidated basic electronic states such as Fermi surface and band structure. In addition, we have directly observed the superconducting gap and established the superconducting pairing symmetry. We also compared the experimental electronic states between the iron pnictides and electron-doped cuprates.