Volobuev, V.V.; Mandal, P.S.; Galicka, M.; Caha, O.; S nchez Barriga, J.; Di Sante, D.; Varykhalov, A.; Khiar, A.; Picozzi, S.; Bauer, G.; Kacman, P.; Buczko, R.; Rader, O.; Springholz, G (2017)
Topological crystalline insulators such as Pb1 xSnxTe have attracted great interest due to the wide tunability of the topological properties through temperature and composition. Here we show that bulk Bi doping of epitaxial Pb1 xSnxTe 111 films induces a giant Rashba splitting of the surface state that can be tuned by the doping level. Tight binding calculations identify its origin as Fermi level pinning by trap states at the surface
Haibel, A.; Rack, A.; Banhart, J (2006)
Borgwardt, M.; Wilke, M.; Kampen, T.; Mähl, S.; Xiang, W.; Spiccia, L.; Lange, K.M.; Kiyan, I.Yu.; Aziz, E.F (2015)
The method of transient XUV photoemission spectroscopy is developed to investigate the ultrafast dynamics of heterogeneous electron transfer at the interface between the N719 ruthenium dye complex and TiO2 nanoparticles. XUV light from high order harmonic generation is used to probe the electron density distribution among the ground and excited states at the interface after its exposure to a pump laser pulse of 530 nm wavelength. A spectral decomposition of the transient emission signal is us...
Sun, F.; Markötter, H.; Manke, I.; Hilger, A.; Kardjilov, N.; Banhart, J (2016)
Siemer, B.; Roling, S.; Frigge, R.; Hoger, T.; Mitzner, R.; Zacharias, H (2014)
Intermolecular reactions in and on icy films on silicate and carbonaceous grains constitute a major route for the formation of new molecular constituents in interstellar molecular clouds. In more diffuse regions and in protoplanetary discs, energetic radiation can trigger reaction routes far from thermal equilibrium. As an analog of interstellar icecovered dust grains, highly oriented pyrolytic graphite HOPG covered with D2O, NO, and H atoms is irradiated by ultrashort XUV pulses and t...