2021


  • Haverkamp, R.; Sorgenfrei, N.L.A.N.; Giangrisostomi, E.; Neppl, S.; Kühn, D.; Föhlisch, A.: Directional charge delocalization dynamics in semiconducting 2H-MoS2 and metallic 1T-LixMo2. Scientific Reports 11 (2021), p. 6893/1-7

  • Sorgenfrei, N.L. A. N.; Giangrisostomi, E.; Jay, R.M.; Kuehn, D.; Neppl, S.; Ovsyannikov, R.; Sezen, H.; Svensson, S.; Foehlisch, A.: Photodriven Transient Picosecond Top-Layer Semiconductor to Metal Phase-Transition in p-Doped Molybdenum Disulfide. Advanced Materials 33 (2021), p. 2006957/1-8

  • Sorgenfrei, N.L.A.N.; Giangrisostomi, E.; Jay, R.M.; Kühn, D.; Neppl, S.; Ovsyannikov, R.; Sezen, H.; Svensson, S.; Föhlisch, A.: Frontispiez: Molybdenum Disulfide: Photodriven Transient Picosecond Top-Layer Semiconductor to Metal Phase-Transition in p-Doped Molybdenum Disulfide. Advanced Materials 33 (2021), p. 2170108/1

  • Villamayor, M.M.S.; Lindblad, A.; Johansson, F.O. L.; Tran, T.; Pham, N.H.; Primetzhofer, D.; Sorgenfrei, N.L.A.N.; Giangrisostomi, E.; Foehlisch, A.; Lourenco, P.; Bernard, R.; Witkowski, N.; Prevot, G.; Nyberg, T.: Growth of two-dimensional WS2 thin films by reactive sputtering. Vacuum 188 (2021), p. 110205/1-9

2019


  • Kühn, D.; Giangrisostomi, E.; Jay, R.; Sorgenfrei, F.; Föhlisch, A.: The influence of x-ray pulse length on space-charge effects in optical pump/x-ray probe photoemission. New Journal of Physics 21 (2019), p. 073042/1-

  • Kühn, D.; Müller, M.; Sorgenfrei, F.; Giangrisostomi, E.; Jay, R.; Ovsyannikov, R.; Mårtensson, N.; Sánchez-Portal, D.; Föhlisch, A.: Directional sub-femtosecond charge transfer dynamics and the dimensionality of 1T-TaS2. Scientific Reports 9 (2019), p. 488/1-9

2018


  • Giangrisostomi, E.; Ovsyannikov, R.; Sorgenfrei, F.; Zhang, T.; Lindblad, A.; Sassa, Y.; Cappel, U.; Leitner, T.; Mitzner, R.; Svensson, S.; Mårtensson, N.; Föhlisch, A.: Low Dose Photoelectron Spectroscopy at BESSY II: Electronic structure of matter in its native state. Journal of Electron Spectroscopy and Related Phenomena 224 (2018), p. 68-78

  • Kühn, D.; Sorgenfrei, F.; Giangrisostomi, E.; Jay, R.; Musazay, A.; Ovsyannikov, R.; Stråhlman, C.; Svensson, S.; Mårtensson, N.; Föhlisch, A: Capabilities of Angle Resolved Time of Flight electron spectroscopy with the 60 degrees wide angle acceptance lens. Journal of Electron Spectroscopy and Related Phenomena 224 (2018), p. 45-50

  • Pontius, N.; Beye, M.; Trabant, C.; Mitzner, R.; Sorgenfrei, F.; Kachel, T.; Wöstmann, M.; Roling, S.; Zacharias, H.; Ivanov, R.; Treusch, R.; Buchholz, M.; Metcalf, P.; Schüßler-Langeheine, C.; Föhlisch, A.: Probing the non-equilibrium transient state in magnetite by a jitter-free two-color X-ray pump and X-ray probe experiment. Structural Dynamics 5 (2018), p. 054501/1-8

2017


  • Fondell, M.; Eckert, S.; Jay, R.; Weniger, C.; Quevedo, W.; Niskanen, J.; Kennedy, B.; Sorgenfrei, F.; Schick, D.; Giangrisostomi, E.; Ovsyannikov, R.; Adamczyk, K.; Huse, N.; Wernet, P.; Mitzner, R.; Föhlisch, A.: Time-resolved soft X-ray absorption spectroscopy in transmission mode on liquids at MHz repetition rates. Structural Dynamics 4 (2017), p. 054902/1-11

2016


  • Dell'Angela, M.; Hieke, F.; Sorgenfrei, F.; Gerken, N.; Beye, M.; Gerasimova, N.; Redlin, H.; Wurth, W.: Ultrafast surface dynamics probed with time resolved photoemission. Surface Science 643 (2016), p. 197-202

  • Schick, D.; Eckert, S.; Pontius, N.; Mitzner, R.; Föhlisch, A.; Holldack, K.; Sorgenfrei, F.: Versatile soft X-ray-optical cross-correlator for ultrafast applications. Structural Dynamics 3 (2016), p. 054304/1-8

  • Sorgenfrei, F.: FEMTOSPEX Molecules and Surfaces: Electron spectroscopy setup for time-resolved laser-pump/ X-ray-probe experiments at BESSY II. Journal of Large Scale Research Facilities JLSRF 2 (2016), p. A-81

2015


  • Dell'Angela, M.; Anniyev, T.; Beye, M.; Coffee, R.; Föhlisch, A.; Gladh, J.; Kaya, S.; Katayama, T.; Krupin, O.; Nilsson, A.; Nordlund, D.; Schlotter, W. F.; Sellberg, J. A.; Sorgenfrei, F.; Turner, J. J.; Öström, H.; Ogasawara, H.; Wolf, M.; Wurth, W.: Vacuum space charge effects in sub-picosecond soft X-ray photoemission on a molecular adsorbate layer. Structural Dynamics 2 (2015), p. 025101/1-10

  • Öberg, H.; Gladh, J.; Dell'Angela, M.; Anniyev, T.; Beye, M.; Coffee, R.; Föhlisch, A.; Katayama, T.; Kaya, S.; LaRue, J.; Mogelhoj, A.; Nordlund, D.; Ogasawara, H.; Schlotter, W. F.; Sellberg, J. A.; Sorgenfrei, F.; Turner, J. J.; Wolf, M.; Wurth, W.; Öström, H.; Nilsson, A.; Norskov, J. K.; Pettersson, L.G.M.: Optical laser-induced CO desorption from Ru(0001) monitored with a free-electron X-ray laser: DFT prediction and X-ray confirmation of a precursor state. Surface Science 640 (2015), p. 80-88

2014


  • Düsterer, S.; Rehders, M.; Al-Shemmary, A.; Behrens, C.; Brenner, G.; Brovko, O.; DellAngela, M.; Drescher, M.; Faatz, B.; Feldhaus, J.; Frühling, U.; Gerasimova, N.; Gerken, N.; Gerth, C.; Golz, T.; Grebentsov, A.; Hass, E.; Honkavaara, K.; Kocharian, V.; Kurka, M.; Limberg, Th.; Mitzner, R.; Moshammer, R.; Plönjes, E.; Richter, M.; Rönsch-Schulenburg, J.; Rudenko, A.; Schlarb, H.; Schmidt, B.; Senftleben, A.; Schneidmiller, E.; Siemer, B.; Sorgenfrei, F.; Sorokin, A.A.; Stojanovic, N.; Tiedtke, K.; Treusch, R.; Vogt, M.; Wieland, M.; Wurth, W.; Wesch, S.; Yan, M.; Yurkov, M.V.; Zacharias, H.; Schreiber, S.: Development of experimental techniques for the characterization of ultrashort photon pulses of extreme ultraviolet free-electron lasers. Physical Review Special Topics - Accelerators and Beams 17 (2014), p. 120702/1-19

  • Fognini, A.; Michlmayr, T.U.; Salvatella, G.; Wetli, C.; Ramsperger, U.; Baehler, T.; Sorgenfrei, F.; Beye, M.; Eschenlohr, A.; Pontius, N.; Stamm, C.; Hieke, F.; Dell'Angela, M.; de Jong, S.; Kukreja, R.; Gerasimova, N.; Rybnikov, V.; Al-Shemmary, A.; Redlin, H.; Raabe, J.; Föhlisch, A.; Duerr, H. A.; Wurth, W.; Pescia, D.; Vaterlaus, A.; Acremann, Y.: Ultrafast reduction of the total magnetization in iron. Applied Physics Letters 104 (2014), p. 032402/1-3

  • Fognini, A.; Salvatella, G.; Michlmayr, T.U.; Wetli, C.; Ramsperger, U.; Bähler, T.; Sorgenfrei, F.; Beye, M.; Eschenlohr, A.; Pontius, N.; Stamm, C.; Hieke, F.; Dell'Angela, M.; de Jong, S.; Kukreja, R.; Gerasimova, N.; Rybnikov, V.; Redlin, H.; Raabe, J.; Föhlisch, A.; Duerr, H.A.; Wurth, W.; Pescia, D.; Vaterlaus, A.; Acremann, Y.: The role of space charge in spin-resolved photoemission experiments. New Journal of Physics 16 (2014), p. 043031/1-9

2013


  • Beye, M.; Anniyev, T.; Coffee, R.; Dell'Angela, M.; Foehlisch, A.; Gladh, J.; Katayama, T.; Kaya, S.; Krupin, O.; Mogelhoj, A.; Nilsson, A.; Nordlund, D.; Norskov, J. K.; Oberg, H.; Ogasawara, H.; Pettersson, L. G. M.; Schlotter, W. F.; Sellberg, J. A.; Sorgenfrei, F.; Turner, J. J.; Wolf, M.; Wurth, W.; Ostrom, H.: Selective Ultrafast Probing of Transient Hot Chemisorbed and Precursor States of CO on Ru(0001). Physical Review Letters 110 (2013), p. 186101/1-6

  • Beye, M.; Schreck, S.; Sorgenfrei, F.; Trabant, C.; Pontius, N.; Schüßler-Langeheine, C.; Wurth, W.; Föhlisch, A.: Stimulated X-ray emission for materials science. Nature 501 (2013), p. 191-196

  • de Jong, S.; Kukreja, R.; Trabant, C.; Pontius, N.; Chang, C.F.; Kachel, T.; Beye, M.; Sorgenfrei, F.; Back, H.C.; Bräuer, B; Schlotter, W.F.; Turner, J.J.; Krupin, O.; Doehler, M.; Zhu, D.; Hossain, M.A.; Scherz, A.O.; Fausti, D.; Novelli, F.; Esposito, M.; Lee, W.S.; Chuang, Y.D.; Lu, D.H.; Moore, R.G.; Yi, M.; Trigo, M.; Kirchmann, P.; Pathey, L.; Golden, M.S.; Buchholz, M.; Metcalf, P.; Parmigiani, F.; Wurth, W.; Föhlisch, A.; Schüßler-Langeheine, C.; Dürr, H.A.: Speed limit of the insulator-metal transition in magnetite. Nature Materials 12 (2013), p. 882/1-5

  • Dell'Angela, M.; Anniyev, T.; Beye, M.; Coffee, R.; Foehlisch, A.; Gladh, J.; Katayama, T.; Kaya, S.; Krupin, O.; LaRue, J.; Mogelhoj, A.; Nordlund, D.; Norskov, J. K.; Oberg, H.; Ogasawara, H.; Ostrom, H.; Pettersson, L. G. M.; Schlotter, W. F.; Sellberg, J. A.; Sorgenfrei, F.; Turner, J. J.; Wolf, M.; Wurth, W.; Nilsson, A.: Real-Time Observation of Surface Bond Breaking with an X-ray Laser. Science 339 (2013), p. 1302-1305

  • Katayama, T.; Anniyev, T.; Beye, M.; Coffee, R.; Dell'Angela, M.; Foehlisch, A.; Gladh, J.; Kaya, S.; Krupin, O.; Nilsson, A.; Nordlund, D.; Schlotter, W. F.; Sellberg, J. A.; Sorgenfrei, F.; Turner, J. J.; Wurth, W.; Ostrom, H.; Ogasawara, H.: Ultrafast soft X-ray emission spectroscopy of surface adsorbates using an X-ray free electron laser. Journal of Electron Spectroscopy and Related Phenomena 187 (2013), p. 9-14

  • Singer, A.; Lorenz, U.; Sorgenfrei, F.; Gerasimova, N.; Gulden, J.; Yefanov, O.; Kurta, R.; Shabalin, A.; Dronyak, R.; Treusch, R.; Kocharyan, V.; Weckert, E.; Wurth, W.; Vartanyants, I.: Hanbury Brown-Twiss interferometry at a free-electron laser. Physical Review Letters 111 (2013), p. 034802/1-5

2012


  • Hellmann, S.; Sohrt, C.; Beye, M.; Rohwer, T.; Sorgenfrei, F.; Marczynski-Bühlow, M.; Kalläne, M.; Redlin, H.; Hennies, F.; Bauer, M.; Föhlisch, A.; Kipp, L.; Wurth, W.; Rossnagel, K.: Time-resolved x-ray photoelectron spectroscopy at FLASH. New Journal of Physics 14 (2012), p. 013062/1-26

  • Krupin, O.; Trigo, M.; Schlotter, W.F.; Beye, M.; Sorgenfrei, F.; Turner, J.J.; Reis, D.A.; Gerken, N.; Lee, S.; Lee, W.S.; Hays, G.; Acremann, Y.; Abbey, B.; Coffee, R.; Messerschmidt, M.; Hau-Riege, S.P.; Lapertot, G.; Lüning, J.; Heimann, P.; Soufli, R.; Fernandez-Perea, M.; Rowen, M.; Holmes, M.; Molodtsov, S.L.; Föhlisch, A.; Wurth, W.: Temporal cross-correlation of x-ray free electron and optical lasers using soft x-ray pulse induced transient reflectivity. Optics Express 20 (2012), p. 11396-11406

  • Schlotter, W.F.; Turner, J.J.; Rowen, M.; Heimann, P.; Holmes, M.; Krupin, O.; Messerschmidt, M.; Moeller, S.; Krzywinski, J.; Soufli, R.; Fernandez-Perea, M.; Kelez, N.; Lee, S.; Coffee, R.; Hays, G.; Beye, M.; Gerken, N.; Sorgenfrei, F.; Hau-Riege, S.; Juha, L.; Chalupsky, J.; Hajkova, V.; Mancuso, A.P.; Singer, A.; Yefanov, O.; Vartanyants, I.A.; Cadenazzi, G.; Abbey, B.; Nugent, K.A.; Sinn, H.; Luning, J.; Schaffert, S.; Eisebitt, S.; Lee, W.S.; Scherz, A.; Nilsson, A.R.; Wurth, W.: The soft x-ray instrument for materials studies at the linac coherent light source x-ray free-electron laser. Review of Scientific Instruments 83 (2012), p. 043107/1-10

2011


  • Pontius, N.; Kachel, T.; Schüssler-Langeheine, C.; Schlotter, W.F.; Beye, M.; Sorgenfrei, F.; Chang, C. F.; Föhlisch, A.; Wurth, W.; Metcalf, P.; Leonov, I.; Yaresko, A.; Stojanovic, N.; Berglund, M.; Guerassimova, N.; Düsterer, S.; Redlin, H.; Dürr, H.A.: Time-resolved resonant soft x-ray diffraction with free-electron lasers: Femtosecond dynamics across the Verwey transition in magnetite. Applied Physics Letters 98 (2011), p. 182504/1-3

2010


  • Beye, M.; Sorgenfrei, F.; Schlotter, W.F.; Wurth, W.; Föhlisch, A.: The liquid-liquid phase transition in silicon revealed by snapshots of valence electrons. Proceedings of the National Academy of Sciences of the United States of Amerika 107 (2010), p. 16772-16776

  • Hellmann, S.; Beye, M.; Sohrt, C.; Rohwer, T.; Sorgenfrei, F.; Redlin, H.; Kallane, M.; Marczynski-Buhlow, M.; Hennies, F.; Bauer, M.; Föhlisch, A.; Kipp, L.; Wurth, W.; Rossnagel, K.: Ultrafast Melting of a Charge-Density Wave in the Mott Insulator 1T-TaS2. Physical Review Letters 105 (2010), p. 187401/1-4