Pseudogap of Metallic Layered NickelateR2−xSrxNiO4(R=Nd,Eu) Crystals Measured Using Angle-Resolved Photoemission Spectroscopy

Pseudogap of Metallic Layered NickelateR2−xSrxNiO4(R=Nd,Eu) Crystals Measured Using Angle-Resolved Photoemission Spectroscopy