Fermi Surface Topology of Borocarbide Superconductor YNi_(2)B_(2)C:Angle-resolved Photoemission Spectroscopy

摘要

We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) of the borocarbide superconductor YNi_(2)B_(2)C to study the Fermi surface (FS) topology of the anisotropic s-wave superconductor. We successfully observed experimental valence band dispersions and Fermi surfaces (FSs), and indicated two nested parts connected by the known nesting vector Q(approx)(0.55,0,0).