NFFA Trieste

HIGHLIGHTS

Kitkaite: From Kitka River to Spintronic Applications

                    ARPES and Spin-ARPES measurements within NFFA Trieste facility allowed to establish that the mineral kitkaite (NiTeSe) originating from the Kitka river area in Finland, hosts type II Dirac Fermions and spin polarized topological surface states with implementation potential in novel photonics, spintronics, and optoelectronics devices.
                

                    
                        From Russia With Love: The First Topological Metal with Termination-Dependent Surface Band Structure and Strong Spin Polarization

                    Combined STM/S and ARPES and Spin-ARPES measurements within NFFA Trieste allowed to correlate the two distinct electronic band structures measured on Pt3Te4 to two distinct surface terminations, both characterized by strongly spin-polarized states. This renders mitrofanovite a candidate material for tunable device functionalities in nanoelectronics, spintronics, optoelectronics, and plasmonic applications.
                

Electronic Properties of Ti Sites in Ziegler–Natta Catalysts

                    Ziegler−Natta (ZN) catalysts are at the main responsible for polyolefin production, affording at present almost 80 million tons of polypropylene per year, with a worldwide economic turnover exceeding 100 billion dollars. However, a true understanding of their properties at the molecular level is still missing. In particular, there is a lack of knowledge on the electronic properties of Ti sites.
                

                    
                        Quantitative Ultrafast Electron-Temperature Dynamics in Photo-Excited gold Nanoparticles by transient Photoemission Spectroscopy

                    Transient Photoemission Spectroscopy at SPRINT @ NFFA-Trieste allowed quantitative, model-free measurement of the ultrafast electron-temperature dynamics of photoexcited plasmonic gold nanoparticles.
                

                    
                        Tuning the magnetic properties of V2O3 / CoFeB heterostructures across the V2O3 structural transition

                    Effects of the V2O3 structural phase transition on the magnetic properties of an amorphous magnetic thin film of CoFeB in contact with it. By means of temperature dependent Kerr effect characterizations, in this paper is proven that crossing the V2O3 structural phase transition induces reproducible and reversible changes to CoFeB magnetic properties, especially to its coercive field.
                

                    
                        Microstructural anisotropy arises upon annealing in ferromagnetic Gr/Co/Ir systems

                    A fine analysis of local structure and magnetic response of Co films intercalated between Graphene and Iridium (Gr/Co/Ir systems) has revealed how the response of such systems to annealing depends on the Co thickness.
                

                    
                        Stabilization by Configurational Entropy of the Cu(II) Active Site during CO Oxidation on Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O

                    The interesting mechanisms of CO oxidation on the novel Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O high entropy oxide were studied by means of operando soft X-ray absorption spectroscopy at APE-HE beamline.
                

                    
                        Proximity-induced ferromagnetism and chemical reactivity in few-layer VSe2 heterostructures

                    The combination of XAS, XMCD and PES measurements showed the role of interfacial magnetic coupling at Fe/VSe2 interface and its chemical reactivity.
                

                    
                        Spin-resolved ARPES experiments on in-situ transferred Bi2Se3 thin films grown by PLD

                    Spin-resolved ARPES experiments on topological insulator Bi2Se3 thin films have been performed at the NFFA-APE facility of IOM-CNR and Elettra (Trieste). Films have been grown by the PLD facility and in-situ transferred to the analysis UHV chambers. Our results demonstrate that the topological surface state can be obtained in PLD-grown Bi2Se3 thin films.
                

                    
                        Layer-dependent quantum cooperation of electron and hole states in the anomalous semimetal WTe2

                    Followed by the discovery of remarkable electronic and physical properties of two-dimensional (2D) materials such as graphene and topological insulators, transition metal dichalcogenides (TMDs), long of interest in material science, have received a renewed attention.
                