Normal Incidence X-ray Standing Waves (NIXSW) is a powerful technique based on synchrotron radiation, which can be employed for structural determination of adsorbate-covered surfaces and for investigating the local environment of subsurface diluted species. Due to the specific photon energy range that is commonly needed for these measurements there are only few end-stations available in the...
Neutron Depth Profiling (NDP) is a non-destructive, high-resolution, near-surface analytical technique, which measures concentration profiles of a set of light nuclides like He-3, B-10, Li-6, N-14, O-17 [1]. The high neutron capture-flux density of 3E10 s-1cm-2 at the PGAA beamline enables good measurement statistics on reasonable time scales and opens the possibility towards tracking changing...
New materials for thin film applications, like photovoltaics and light emitting diodes, are often deposited from solution. One of these relatively new material classes is hybrid organic-halide perovskite. The performance of such perovskite thin films depends not only on their composition, but also their structural and morphological features.[1]
We applied in situ real-time grazing incidence...
Europium monoxide (EuO) is the first rare-earth semiconducting oxide known for its giant magneto-optic Kerr [1] and Faraday [2] effects, metal-insulator transition [3] and anomalous Hall effect [4]. Presently, it is one of the favored candidates for applications as a spin filter in future spintronic devices due to the large exchange splitting of its conduction band [5]. Employing inelastic...
Variable energy positron annihilation lifetime spectroscopy measurements using the high intensity positron beam have been performed on high quality SrTiO$_3$, and SrTiO$_3$/LaAlO$_3$, thin films grown by pulsed laser deposition (PLD) and on near surface region of SrTiO$_3$ substrates subjected to PLD growth conditions. The measurements were performed using the NEPOMUC beamline at Heinz...
In a metal the Fermi Surface is the separation – in momentum space – between occupied and unoccupied states. Here, thermal excitation are possible and rearrangements of the electronic structures such as the superconducting instability, magnetic moment formation and charge density wave-like phase transitions can be driven by the electronic states on the Fermi surface.
Angle-resolved...