Spin-polarized photoemission spectroscopy of magnetic surfaces using undulator radiation

Abstract

A beamline has been established at the National Synchrotron Light Source to perform angleresolved photoemission experiments on magnetic surfaces with spin sensitivity. The system has two novel features: it uses a miniature electron-spin polarization analyzer and it also uses synchrotron radiation from an undulator rather than a bending magnet.

Radiation-induced decomposition of the metal-organic molecule Bis(4-cyano-2,2,6,6-tetramethyl-3,5-heptanedionato)copper(II)

“…The ultrahigh vacuum photoemission end-station at the SGM beamline was equipped with a hemispherical electron energy analyzer (EA125, Omicron GmbH) [17,18]. The analyzer had a AE28 angular resolution while the combined energy resolution of the analyzer and the light source was approximately 150 meV or less.…”

“…Ultraviolet photoemission spectra (ARPES) of the adsorbed molecular layers on Co(1 1 1) were acquired at the U5UA undulator spherical grating monochromator (SGM) beamline at the National Synchrotron Light Source (NSLS) [17,18], as described elsewhere [15]. The ultrahigh vacuum photoemission end-station at the SGM beamline was equipped with a hemispherical electron energy analyzer (EA125, Omicron GmbH) [17,18].…”

Induced spin polarization of copper spin 1/2 molecular layers

“…Spin polarized angle resolved photoemission spectra were acquired at the U5UA undulator spherical grating monochromator (SGM) beamline at the National Synchrotron Light Source (NSLS) [15][16][17]. Linearly polarized light from an undulator source was monochromatized using a spherical grating monochromator (SGM) operating in the range 20 to 150 eV.…”

A New Spin on Photoemission Spectroscopy

“…Additional alternative spin-orbit based schemes have been developed such as the adsorbed current polarimeter 95,16 and the low energy diffuse scattering polarimeter, 156,144,157 but all seem to provide similar or less promising characteristics and FOMs. A fantastic review directly comparing the practical usage of an assortment of these spin-orbit based polarimeters is found in ref.…”