This beamline will provide excellent opportunities for high resolution angle-resolved photoelectron spectroscopy (ARPES), optionally spin resolved (Spin-ARPES) and core-level spectroscopy (CLS). The photon energy range, including both UV and soft X-ray energies, is carefully chosen to combine superb performance with a high flexibility when it comes to various types of ARPES/Spin-ARPES and core-level studies. ARPES studies can be performed with extremely high k- and energy-resolutions especially in the lower part of the photon energy range (UV-range). The high k-resolution is a consequence of the low kinetic energies of the emitted electrons and the very high angle-resolution of modern hemispherical analyzers with two-dimensional (2D) detection systems. By including the UV-range we also take advantage of the high cross section for photoemission from the valence band. The ARPES end station will have a unique combination of a fixed, large, hemispherical analyzer with a 2-D detector and a smaller angle-resolved hemispherical analyzer mounted on a goniometer that allows for both horizontal and vertical motion. An advantage of the goniometer is that it allows for an independent choice of incidence and emission angles which is very important to be able to explore various symmetries of the electronic states that are investigated. The fixed analyzer with the 2-D detector is extremely efficient when used for band mapping over extended regions in k-space; augmented with a suitable detector it can provide spin-resolved spectra.
The ARPES end station will be ideal for mapping two dimensional energy dispersions E(kx,ky), from which Fermi surfaces and other initial energy surfaces can be constructed. The two-dimensional band structure obtained in this way contains all information about surface bands on three-dimensional samples and the electronic bands of two- and one-dimensional samples.
Research applications at this beamline cover a range of important topics in physics, including
nanostructured systems, new materials, organic molecular layers, magnetic semiconductors, correlated systems and cooperative phenomena.
Contact persons
Balasubramanian Thiagarajan, MAX IV Laboratory (Project Manager)
Email: Balasubramanian.Thiagarajan@maxlab.lu.se
Phone: +46 (0)46-222 33 58
Roger Uhrberg, Linköping University (Spokesperson)
Email: roger.uhrberg@liu.se
Phone: +46 (0)13-28 23 85
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