High-resolution laser-driven spin-ARPES
In PGI-6 we have developed the high-resolution angle-resolved photoemission setup, which pioneers the 3D momentum scanning using single-channel FERRUM spin detector by Focus GmbH, that we helped to develop. The full capabilities of the state-of-the-art high-resolution ARPES are also available, including the lens deflector scanning built into the MBS A1 analyzer by MBS AB. The system is equipped with the continuous wave 6 eV laser from LEOS Solutions, Xe microwave lamp from MBS AB, and He lamp with refocusing mirror from Focus GmbH, as well as 5-axis manipulator from PREVAC. Recently we obtained temperatures <9K by attaching the diode in the sample area. Fitting the Fermi level in the laser-drive ARPES from polycrystalline gold results in <3 meV total resolution (without subtracting any contributions), in good agreement with the temperature calibration.
Exceptional performance of the system is demonstrated in our recent work on WTe2.
Publications
Tristan Heider, Gustav Bihlmayer, Jakub Schusser, Friedrich Reinert, Jan Minár, Stefan Blügel, Claus M. Schneider, and Lukasz Plucinski, “Geometry-Induced Spin Filtering in Photoemission Maps from WTe2 Surface States”, Phys. Rev. Lett. 130, 146401 (2023), https://doi.org/10.1103/PhysRevLett.130.146401
S. Suga, A. Sekiyama, G. Funabashi, J. Yamaguchi, M. Kimura, M. Tsujibayashi, T. Uyama, H. Sugiyama, Y. Tomida, G. Kuwahara, S. Kitayama, K. Fukushima, Y. Saitoh, L. Plucinski, and C. M. Schneider, “High resolution, low hv photoelectron spectroscopy with use of a microwave excited rare gas lamp and ionic crystal filters”, Rev. Sci. Instruments 81, 105111, (2010), https://doi.org/10.1063/1.3488367
M. Escher, N. B. Weber, M. Merkel, L. Plucinski, and C. M. Schneider, “FERRUM: A New Highly Efficient Spin Detector for Electron Spectroscopy” e-Journal of Surface Science and Nanotechnology 9, 340 (2011), https://doi.org/10.1380/ejssnt.2011.340