SIS - X09LA: Surface / Interface Spectroscopy
The Surface/Interface Spectroscopy (SIS) beamline provides a state-of-the-art experimental set-up to study the electronic band structure of novel complex materials by spin- and angle-resolved photoemission spectroscopies. The beamline operates in the energy range from 20 to 800 eV with high flux, high resolution, variable polarization, and low high-harmonic contamination.
The beamline serves two endstations:
- ULTRA (Ultra Low-Temperature high-Resolution ARPES)
for angle-resolved photoelectron spectroscopy (ARPES) - COPHEE (Complete PHotoEmission Experiment)
for spin- and angle-resolved photoelectron spectroscopy (SARPES)
Users can apply for beamtime with the provided endstations or with their own endstation (after prior consultation with the beamline scientist).
| Energy range | 20 - 800 eV |
|---|---|
| Resolving power (E/Δ E) | 104 |
| Polarization | linear horizontal (20 - 800 eV) linear vertical (40 - 800 eV) circular left/right (50-800 eV) |
| Flux on sample (200 eV) | 2*1013 ph/s/0.1%BW/0.4 A |
| Higher order mode contamination | < 0.1 % |
| Spot size on sample (200 eV) | 50 x 100 µm2 (FWHM) |
Current Highlights and News
Creating novel quantum phases via the heterostructure engineering
Within this synergetic collaboration, PSI scientists have investigated the correlation between magnetic and electronic ordering in NdNiO3 by tuning its properties through proximity to a ferromagnetic manganite layer. The main outcome is that the stray magnetic field from the manganite layer causes a novel ferromagnetic-metallic (FM-M) phase in NNO. This work demonstrates the utilization of heterostructure engineering for creating novel quantum phases.
Novel structural orthorhombicity in an iron-pnictide superconductor
Researchers from University of Zurich describe the experimental observation of a new orthorhombic structural phase in the superconducting iron-pnictide compound Pr4Fe2As2Te0.88O4. In contrast to nematicity found in underdoped iron pnictides this phase transition is not electronically driven.
Weyl fermions discovered in another class of materials
A particular variety of particles, the so-called Weyl fermions, had previously only been detected in certain non-magnetic materials. But now researchers at PSI have experimentally proved their existence for the first time in a specific paramagnetic material.