1. Single crystal synthesis and surface electronic structure of Bi_{1.993}Cr_{0.007}Se_{3}Sandra Gardonio, Zipporah Rini Benher, Mattia Fanetti, Paolo Moras, Polina M. Sheverdyaeva, Matjaž Valant, 2024, original scientific article Keywords: topological insulators, magnetic atoms, crystal synthesis, formation of clusters, surface electronic structure Published in RUNG: 21.08.2024; Views: 760; Downloads: 8 Full text (2,05 MB) This document has many files! More... |
2. Giant and tunable out-of-plane spin polarization of topological antimonenePolina M. Sheverdyaeva, Conor Hogan, Gustav Bihlmayer, Jun Fujii, Ivana Vobornik, Matteo Jugovac, Asish K. Kundu, Sandra Gardonio, Zipporah Rini Benher, Giovanni di Santo, 2023, original scientific article Keywords: density functional theory, spin-resolved ARPES, electronic structure, topological insulators, 2D materials, antimonene Published in RUNG: 18.07.2023; Views: 1831; Downloads: 5 Full text (4,26 MB) This document has many files! More... |
3. Experimental and Theoretical Photoemission Study of Indole and Its Derivatives in the Gas PhaseO. Plekan, H. Sa'adeh, A. Ciavardini, C. Callegari, G. Cautero, C. Dri, M. Di Fraia, K.C. Prince, R. Richter, R. Sergo, L. Stebel, M. Devetta, D. Faccialà, C. Vozzi, L. Avaldi, P. Bolognesi, M.C Castrovilli, D. Catone, M. Coreno, F. Zuccaro, E. Bernes, G. Fronzoni, D. Toffoli, 2020, original scientific article Keywords: Binding energy, Calculations, Core levels, Electronic structure, Ionization of gases, Ionization potential, Molecular orbitals, Photoelectron spectroscopy, Photoelectrons, Photoemission, Photoionization, Photons, Polycyclic aromatic hydrocarbons, X rays Published in RUNG: 21.01.2022; Views: 2748; Downloads: 0 This document has many files! More... |
4. Topological properties and self-energy effects in elemental YbPolina M. Sheverdyaeva, F. Offi, Sandra Gardonio, Luka Novinec, M. I. Trioni, D. Ceresoli, S. Iacobucci, A. Ruocco, Giovanni Stefani, L. Petaccia, 2021, original scientific article Keywords: electronic structure, topological materials, lanthanides, angle-resolved photoemission spectroscopy Published in RUNG: 03.12.2021; Views: 2508; Downloads: 39 Link to full text This document has many files! More... |
5. Orbital selective dynamics in Fe-pnictides triggered by polarized pump pulse excitationsGanesh Adhikary, Tanusree Saha, Primož Rebernik Ribič, Matija Stupar, Barbara Ressel, Jurij Urbančič, Giovanni De Ninno, A. Thamizhavel, Kalobaran Maiti, 2021, original scientific article Abstract: Quantum materials display exotic behaviours related to the interplay between temperature-driven phase transitions. Here, we study the electron dynamics in one such material, CaFe$_2$As$_2$, a parent Fe-based superconductor, employing time and angle-resolved photoemission spectroscopy. CaFe$_2$As$_2$ exhibits concomitant transition to spin density wave state and tetragonal to orthorhombic structure below 170 K. The Fermi surface of this material consists of three hole pockets ($\alpha$, $\beta$ and $\gamma$) around $\Gamma$-point and two electron pockets around $X$-point. The hole pockets have $d_{xy}$, $d_{yz}$ and $d_{zx}$ orbital symmetries. The $\beta$ band constituted by $d_{xz}$/$d_{yz}$ orbitals exhibit a gap across the magnetic phase transition. We discover that polarized pump pulses can induce excitations of electrons of a selected symmetry. More specifically, while $s$-polarized light (polarization vector perpendicular to the $xz$-plane) excites electrons corresponding to all the three hole bands, $p$-polarized light excites electrons essentially from ($\alpha$,$\beta$) bands which are responsible for magnetic order. Interestingly, within the magnetically ordered phase, the excitation due to the $p$-polarized pump pulses occur at a time scale of 50 fs, which is significantly faster than the excitation induced by $s$-polarized light ($\sim$ 200 fs). These results suggest that the relaxation of different ordered phases occurs at different time scales and this method can be used to achieve selective excitations to disentangle complexity in the study of quantum materials. Keywords: Electronic structure, Pnictides and chalcogenides, Time-resolved spectroscopy Published in RUNG: 13.10.2021; Views: 2730; Downloads: 9 Full text (9,56 MB) |
6. Stoichiometry and disorder influence over electronic structure in nanostructured VO[sub]x filmsAlessandro D'Elia, S. J. Rezvani, Nicola Zema, F. Zuccaro, Mattia Fanetti, Blaž Belec, B. W. Li, C. W. Zou, Carlo Spezzani, Maurizio Sacchi, Augusto Marcelli, Marcello Coreno, 2021, original scientific article Keywords: nanoparticles, VOx films, electronic structure, nanostructured films Published in RUNG: 31.01.2021; Views: 3179; Downloads: 0 This document has many files! More... |
7. Interplay among Work Function, electronic structure and stoichiometry in nanostructured VOx films2020, original scientific article Abstract: The work function is the parameter of greatest interest in many technological applications involving charge exchange
mechanisms at the interface. The possibility to produce samples with a controlled work function is then particularly
interesting, albeit challenging. We synthetized nanostructured vanadium oxide films by a room temperature Supersonic
Cluster Beam Deposition method, obtaining samples with tunable stoichiometry and work function (3.7-7 eV). We present
an investigation of the electronic structure of several vanadium oxide films as a function of the oxygen content via in-situ
Auger, valence-band photoemission spectroscopy and work function measurements. The experiments probed the partial 3d
density of states, highlighting the presence of strong V3d-O2p and V3d-V4s hybridization which influence 3d occupation. We
show how controlling the stoichiometry of the sample implies control over work function, and that the access to nanoscale
quantum confinement can be exploited to increase the work function of the sample relative to the bulk analogue. In general,
the knowledge of the interplay among work function, electronic structure, and stoichiometry is strategic to match
nanostructured oxides to their target applications Keywords: work function, VOx, Electronic structure, nanostructured films Published in RUNG: 24.02.2020; Views: 3262; Downloads: 0 This document has many files! More... |
8. Accelerating GW calculations with optimal polarizability basisPaolo Umari, Luigi Giacomazzi, Xiaofeng Qian, Nicola Marzari, Stefano Baroni, Geoffrey Stenuit, 2011, independent scientific component part or a chapter in a monograph Keywords: GW, silicon nitride, DFT, silica, electronic structure Published in RUNG: 19.10.2018; Views: 4062; Downloads: 0 This document has many files! More... |