# FS-SXQM

 2020-01-2314:54 [PUBDB-2020-00522] Journal Article et al Time- and momentum-resolved photoemission studies using time-of-flight momentum microscopy at a free-electron laser Review of scientific instruments 91(1), 013109 - (2020) [10.1063/1.5118777]   Time-resolved photoemission with ultrafast pump and probe pulses is an emerging technique with wide application potential. Real-time recording of nonequilibrium electronic processes, transient states in chemical reactions, or the interplay of electronic and structural dynamics offers fascinating opportunities for future research. [...] OpenAccess: PDF PDF (PDFA); 2020-01-1412:17 [PUBDB-2020-00200] Journal Article et al Reversible coordination-induced spin-state switching in complexes on metal surfaces Nature nanotechnology 15(1), 18 - 21 (2020) [10.1038/s41565-019-0594-8]   Molecular spin switches are attractive candidates for controlling the spin polarization developing at the interface between molecules and magnetic metal surfaces, which is relevant for molecular spintronics devices. However, so far, intrinsic spin switches such as spin-crossover complexes have suffered from fragmentation or loss of functionality following adsorption on metal surfaces, with rare exceptions. [...] Fulltext: PDF PDF (PDFA); 2020-01-1412:13 [PUBDB-2020-00199] Journal Article et al Yu–Shiba–Rusinov States in the Charge-Density Modulated Superconductor $NbSe_{2}$ Nano letters 20(1), 339 - 344 (2020) [10.1021/acs.nanolett.9b03988]   NbSe2 is a remarkable superconductor in which charge-density order coexists with pairing correlations at low temperatures. Here, we study the interplay of magnetic adatoms and their Yu–Shiba–Rusinov (YSR) bound states with the charge density order. [...] Fulltext: PDF PDF (PDFA); 2020-01-0712:58 [PUBDB-2020-00041] Journal Article et al 80% Valley Polarization of Free Carriers in Singly Oriented Single-Layer $WS_{2}$ on Au(111) Physical review letters 123(23), 236802 (2019) [10.1103/PhysRevLett.123.236802]   We employ time- and angle-resolved photoemission spectroscopy to study the spin- and valley-selectivephotoexcitation and dynamics of free carriers at the ‾ K and ‾ K0 points in singly oriented single-layerWS2=Auð111Þ. Our results reveal that in the valence band maximum an ultimate valley polarization of freeholes of 84% can be achieved upon excitation with circularly polarized light at room temperature. [...] OpenAccess: PDF PDF (PDFA); 2019-10-1812:19 [PUBDB-2019-03710] Journal Article et al Surface structure and stacking of the commensurate $(√13 × √13)R13.9°$ charge density wave phase of $1T−TaS_{2}(0001)$ Physical review / B covering condensed matter and materials physics 100(15), 1554071-15540711 (2019) [10.1103/PhysRevB.100.155407]   By quantitative low-energy electron diffraction (LEED) we investigate the extensively studied commensurate charge density wave (CDW) phase of trigonal tantalum disulphide (1T−TaS2), which develops at low temperatures with a (13×13)R13.9∘ periodicity. A full-dynamical analysis of the energy dependence of diffraction spot intensities reveals the entire crystallographic surface structure, i.e., the detailed atomic positions within the outermost two trilayers consisting of 78 atoms as well as the CDW stacking. [...] OpenAccess: PDF PDF (PDFA); 2019-09-3011:05 [PUBDB-2019-03496] Journal Article et al Surface states and Rashba-type spin polarization in antiferromagnetic $MnBi_{2}Te_{4}$ (0001) Physical review / B covering condensed matter and materials physics 100(12), 121104-1-121104-6 (2019) [10.1103/PhysRevB.100.121104]   The layered van der Waals antiferromagnet $MnBi_{2}Te_{4}$ (0001) has been predicted to combine the band ordering of archetypical topological insulators such as Bi2Te3 with the magnetism of Mn, making this material a viable candidate for the realization of various magnetic topological states. We have systematically investigated the surface electronic structure of $MnBi_{2}Te_{4}$ (0001)single crystals by use of spin- and angle-resolved photoelectron spectroscopy experiments. [...] OpenAccess: PhysRevB.100.121104 - PDF PDF (PDFA); MnBi2Te4_ARPES - PDF PDF (PDFA); External link: Fulltext 2019-08-1216:52 [PUBDB-2019-02991] Journal Article et al Influence of Substrate Electronic Properties on the Integrity and Functionality of an Adsorbed Fe(II) Spin-Crossover Compound The journal of physical chemistry / C 123(29), 17774 - 17780 (2019) [10.1021/acs.jpcc.9b02845]   The bistability of spin-crossover complexes on surfaces is of great interest for potential applications. Using X-ray absorption spectroscopy, we investigated the properties of [Fe(pypyr(CF$_3$)$_2$)$_2$(phen)] (pypyr = 2-(2′-pyridyl)pyrrolide, phen = 1,10-phenanthroline), a vacuum-evaporable Fe(II) complex, in direct contact to a set of substrates. [...] Published on 2019-07-01. Available in OpenAccess from 2020-07-01.: PDF; Restricted: PDF PDF (PDFA); 2019-01-1010:31 [PUBDB-2019-00262] Journal Article et al Quasi-free-standing single-layer $\mathrm{WS_{2}}$ achieved by intercalation Physical review materials 2(12), 124001 (2018) [10.1103/PhysRevMaterials.2.124001]   Large-area and high-quality single-layer transition metal dichalcogenides can be synthesized by epitaxial growth on single-crystal substrates. An important advantage of this approach is that the interaction between the single layer and the substrate can be strong enough to enforce a single crystalline orientation of the layer [...] OpenAccess: PDF PDF (PDFA); 2018-12-1914:25 [PUBDB-2018-05746] Journal Article Rossnagel, K. More than electrons Nature materials 17(8), 658 - 660 (2018) [10.1038/s41563-018-0131-4]   Published on 2018-07-24. Available in OpenAccess from 2019-01-24.: PDF PDF (PDFA); Restricted: PDF PDF (PDFA); 2018-10-1215:25 [PUBDB-2018-03763] Journal Article et al Light-Induced Spin Crossover in an Fe(II) Low-Spin Complex Enabled by Surface Adsorption The journal of physical chemistry letters 9(7), 1491 - 1496 (2018) [10.1021/acs.jpclett.8b00338]   Understanding and controlling the spin-crossover properties of molecular complexes can be of particular interest for potential applications in molecular spintronics. Using near-edge X-ray absorption fine structure spectroscopy, we investigated these properties for a new vacuum-evaporable Fe(II) complex, namely [Fe(pypyr(CF$_3$)$_2$)$_2$(phen)] (pypyr = 2-(2′-pyridyl)pyrrolide, phen = 1,10-phenanthroline). [...] Published on 2018-03-06. Available in OpenAccess from 2019-03-06.: PDF PDF (PDFA); Restricted: PDF PDF (PDFA); External link: Fulltext