Temperature dependence of spin-and angle-resolved photoemission of Ni

Photoelectron spectroscopy has been continuing to be one of the major experimental techniques to investigate electronic structures of solids and solid surfaces. It is not only by the reason that photoemission spectra give us information on energy-, momentum- and spin-dependent electronic structure of the material under the study, but also that we could obtain information on many-body interactions between photoexcited hole and the electron system in the solid, which accompanies with photoelectron excitation and its decay processes. Especially, the application of synchrotron radiation to photoemission allows easily to change the energy and polarization of incident photons, and to obtain more precise information on the electronic structures. Recently, insertion devices further improve the feasibility of photoemission experiments requiring high incident photon flux such as spin-resolved photoemission and magnetic linear and circular dichroism in photoemission spectra, which provide us complimentary information on the electronic structures of magnetic materials. In the following, we will concern with spin-dependent electronic structures of Ni obtained by spin- and angle-resolved photoemission experiments at finite temperature.