• Full 3D Spin Detection Capability
2D-CCD/3D-Spin VLEED Detector
Schematic set-up of PHOIBOS analyzer with 2D-CCD/3D-Spin VLEED Detector
SPECS has integrated the Ferrum VLEED spin detector (FOCUS GmbH) into its proven 2D-CCD/ 3D-Spin Detector concept. Using a transfer lens with electrostatic 90° deflector and the patented (PCT/EP2011/070226) spin rotation lens, the Ferrum detector is enabled to perform at full 3D spin detection capability. The uniquely high signal from the Ferrum detector is thus combined with the proven performance of the PHOIBOS 2D-CCD analyzers. The addition of spin detection does not compromise the performance of the CCD detection, which retains exactly the same size and performance as for the standard SPECS CCD detector. The 2D-CCD/ 3D-Spin VLEED detector can be retrofitted on PHOIBOS 150 and PHOIBOS 225 analyzers. The seamless integration of the detector into SpecsLab Prodigy makes high end spin resolved ARPES measurements a routine task.
|The Spin Rotation Lens|
The spin rotation lens rotates the main detected lateral spin polarization component by +/-45° relative to the ky axis. This is indicated by PR- and PR+ in the figure.
The spin rotation lens rotates the transversal component of the spin polarization, by +/-45°. In combination with a 90° electrostatic deflector, this gives acces to all three components of the spin polarization vector. Magnetization of the scattering target of the VLEED detector in the x-direction gives access to the spin polarization component normal to the sample surface. Magnetization of the target in the z-direction gives acces to one of the polarization components parallel to the sample surface, depending on the setting of the spin rotation lens.