Imaging the Three-Dimensional Fermi-Surface Pairing near the Hidden-Order Transition inURu2Si2Using Angle-Resolved Photoemission Spectroscopy

Fermi surface of Sr2RuO4 from angle resolved photoemission

We investigated the low-energy electronic structure of Sr2RuO4 by angle-resolved photoemission spectroscopy (ARPES) focusing, in particular, on the controversial issues of the Fermi surface (FS) topology and of the extended van Hove singularity (evHs). A detailed study of temperature and photon energy dependence demonstrates the surface-state nature of the electronic band responsible for the ev...

Exchange splitting of the three Γ ̄ surface states of Ni(111) from three-dimensional spin- and angle-resolved photoemission spectroscopy

The valence-band electronic structure of a clean Ni(111) surface is investigated by spin-resolved photoemission. At room temperature the orientation of the photoelectron spins on the Bloch sphere and the exchange splitting of surface and bulk states along the surface normal (Γ̅ ) are determined. All investigated states are found to have a sizable exchange splitting >50 meV. Since the splitting i...

Time- and angle-resolved photoemission spectroscopy of hydrated electrons near a liquid water surface.

We present time- and angle-resolved photoemission spectroscopy of trapped electrons near liquid surfaces. Photoemission from the ground state of a hydrated electron at 260 nm is found to be isotropic, while anisotropic photoemission is observed for the excited states of 1,4-diazabicyclo[2,2,2]octane and I- in aqueous solutions. Our results indicate that surface and subsurface species create hyd...

Three-dimensional electronic structure of superconducting iron pnictides observed by angle-resolved photoemission spectroscopy

Department of Complexity Science and Engineering and Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075 Institute for Material Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801 National Institute of Advanced Industrial Science and Technology (AIST),...

Angle resolved resonant photoemission in transition metals