Son, Sang-Kil, Ph.D.

2023–2024
73	X-ray-induced atomic transitions via machine learning: A computational investigation Laura Budewig, Sang-Kil Son, Zoltan Jurek, Malik Muhammad Abdullah, Marina Tropmann-Frick, and Robin Santra Phys. Rev. Res. 6, 013265 (2024) [BibTeX][pdf][abstract]doi:10.1103/PhysRevResearch.6.013265
72	The beam transport system for the Small Quantum Systems instrument at the European XFEL: optical layout and first commissioning results Tommaso Mazza, Thomas M. Baumann, Rebecca Boll, Alberto De Fanis, Patrik Grychtol, Markus Ilchen, Jacobo Montaño, Valerija Music, Yevheniy Ovcharenko, Nils Rennhack, Daniel E. Rivas, Aljoscha Rörig, Philipp Schmidt, Sergey Usenko, Pawel Ziołkowski, Daniele La Civita, Maurizio Vannoni, Harald Sinn, Barbara Keitel, Elke Plönjes, Ulf Fini Jastrow, Andrey Sorokin, Kai Tiedtke, Klaus Mann, Bernd Schäfer, Niels Breckwoldt, Sang-Kil Son, and Michael Meyer J. Synchrotron Radiat. 30, 457–467 (2023) [BibTeX][pdf][abstract]doi:10.1107/S1600577522012085
71	Multiple-core-hole resonance spectroscopy with ultraintense X-ray pulses Aljoscha Rörig, Sang-Kil Son, Tommaso Mazza, Philipp Schmidt, Thomas M. Baumann, Benjamin Erk, Markus Ilchen, Joakim Laksman, Valerija Music, Shashank Pathak, Daniel E. Rivas, Daniel Rolles, Svitozar Serkez, Sergey Usenko, Robin Santra, Michael Meyer, and Rebecca Boll Nat. Commun. 14, 5738 (2023) [BibTeX][pdf][abstract]doi:10.1038/s41467-023-41505-1
70	State-resolved ionization dynamics of neon atom induced by x-ray free-electron-laser pulses Laura Budewig, Sang-Kil Son, and Robin Santra Phys. Rev. A 107, 013102 (2023) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.107.013102
69	Machine-learning calibration of intense x-ray free-electron-laser pulses using Bayesian optimization Niels Breckwoldt, Sang-Kil Son, Tommaso Mazza, Aljoscha R"orig, Rebecca Boll, Michael Meyer, Aaron C. LaForge, Debadarshini Mishra, Nora Berrah, and Robin Santra Phys. Rev. Res. 5, 023114 (2023) [BibTeX][pdf][abstract]doi:10.1103/PhysRevResearch.5.023114
2022
68	X-ray multiphoton-induced Coulomb explosion images complex single molecules Rebecca Boll, Julia M. Schäfer, Benoît Richard, Kilian Fehre, Gregor Kastirke, Zoltan Jurek, Markus S. Schöffler, Malik M. Abdullah, Nils Anders, Thomas M. Baumann, Sebastian Eckart, Benjamin Erk, Alberto De Fanis, Reinhard Dörner, Lutz Foucar, Sven Grundmann, Patrik Grychtol, Alexander Hartung, Max Hofmann, Markus Ilchen, Ludger Inhester, Christian Janke, Rui Jin, Max Kircher, Katharina Kubicek, Maksim Kunitski, Xiang Li, Tommaso Mazza, Severin Meister, Niklas Melzer, Jacobo Montano, Valerija Music, Giammarco Nalin, Yevheniy Ovcharenko, Christopher Passow, Andreas Pier, Nils Rennhack, Jonas Rist, Daniel E. Rivas, Daniel Rolles, Ilme Schlichting, Lothar Ph.H. Schmidt, Philipp Schmidt, Juliane Siebert, Nico Strenger, Daniel Trabert, Florian Trinter, Isabel Vela-Perez, Rene Wagner, Peter Walter, Miriam Weller, Pawel Ziolkowski, Sang-Kil Son, Artem Rudenko, Michael Meyer, Robin Santra, and Till Jahnke Nat. Phys. 18, 423–428 (2022) [BibTeX][pdf][abstract]doi:10.1038/s41567-022-01507-0
67	Theoretical investigation of orbital alignment of x-ray-ionized atoms in exotic electronic configurations Laura Budewig, Sang-Kil Son, and Robin Santra Phys. Rev. A 105, 033111 (2022) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.105.033111
66	Plasma environmental effects in the atomic structure for simulating x-ray free-electron-laser-heated solid-density matter Rui Jin, Zoltan Jurek, Robin Santra, and Sang-Kil Son Phys. Rev. E 106, 015206 (2022) [BibTeX][pdf][abstract]doi:10.1103/PhysRevE.106.015206
65	Nonsequential two-photon absorption in solid Ge irradiated by an intense x-ray free-electron-laser pulse Stanislaw Wirok-Stoletow, Rui Jin, Daria Kolbasova, Sang-Kil Son, Andrew Aquila, and Robin Santra Phys. Rev. A 106, 023118 (2022) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.106.023118
2021
64	Pulse energy and pulse duration effects in the ionization and fragmentation of iodomethane by ultraintense hard x rays Xiang Li, Ludger Inhester, Seyyed J. Robatjazi, Benjamin Erk, Rebecca Boll, Kota Hanasaki, Koudai Toyota, Yajiang Hao, Cedric Bomme, Benedikt Rudek, Lutz Foucar, Stephen H. Southworth, Carl S. Lehmann, Bertold Krässig, Tatiana Marchenko, Marc Simon, Kiyoshi Ueda, Ken R. Ferguson, Maximilian Bucher, Tais Gorkhover, Sebastian Carron, Roberto Alonso-Mori, Jason E. Koglin, Jonathan Correa, Garth J. Williams, Sébastien Boutet, Linda Young, Christoph Bostedt, Sang-Kil Son, Robin Santra, Daniel Rolles, and Artem Rudenko Phys. Rev. Lett. 127, 093202 (2021) [BibTeX][pdf][abstract]doi:10.1103/PhysRevLett.127.093202
63	Electron-ion coincidence measurements of molecular dynamics with intense x-ray pulses Xiang Li, Ludger Inhester, Timur Osipov, Rebecca Boll, Ryan Coffee, James Cryan, Ave Gatton, Tais Gorkhover, Gregor Hartman, Markus Ilchen, André Knie, Ming-Fu Lin, Michael P. Minitti, Clemens Weninger, Thomas J.A. Wolf, Sang-Kil Son, Robin Santra, Daniel Rolles, Artem Rudenko, and Peter Walter Sci. Rep. 11, 505 (2021) [BibTeX][pdf][abstract]doi:10.1038/s41598-020-79818-6
62	Transient ionization potential depression in nonthermal dense plasmas at high x-ray intensity Rui Jin, Malik Muhammad Abdullah, Zoltan Jurek, Robin Santra, and Sang-Kil Son Phys. Rev. E 103, 023203 (2021) [BibTeX][pdf][abstract]doi:10.1103/PhysRevE.103.023203
61	Suppression of thermal nanoplasma emission in clusters strongly ionized by hard x-rays Yoshiaki Kumagai, Zoltan Jurek, Weiqing Xu, Vikrant Saxena, Hironobu Fukuzawa, Koji Motomura, Denys Iablonskyi, Kiyonobu Nagaya, Shin-ichi Wada, Yuta Ito, Tsukasa Takanashi, Shuhei Yamada, Yuta Sakakibara, Toshiyuki Nishiyama, Takayuki Umemoto, Minna Patanen, John D. Bozek, Ioan Dancus, Mihail Cernaianu, Catalin Miron, Tobias Bauer, Melanie Mucke, Edwin Kukk, Shigeki Owada, Tadashi Togashi, Kensuke Tono, Makina Yabashi, Sang-Kil Son, Beata Ziaja, Robin Santra, and Kiyoshi Ueda J. Phys. B: At. Mol. Opt. Phys. 54, 044001 (2021) [Special issue on Frontiers of AMO Science with FELs and Synchrotron Radiation] [BibTeX][abstract]doi:10.1088/1361-6455/abd878
60	Probing ultrafast coherent dynamics in core-excited xenon by using attosecond XUV-NIR transient absorption spectroscopy Daria Kolbasova, Maximilian Hartmann, Rui Jin, Alexander Blättermann, Christian Ott, Sang-Kil Son, Thomas Pfeifer, and Robin Santra Phys. Rev. A 103, 043102 (2021) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.103.043102
59	Resonance-enhanced multiphoton ionization in the x-ray regime Aaron C. LaForge, Sang-Kil Son, Debadarshini Mishra, Markus Ilchen, Stephen Duncanson, Eemeli Eronen, Edwin Kukk, Stanislaw Wirok-Stoletow, Daria Kolbasova, Peter Walter, Rebecca Boll, Alberto De Fanis, Michael Meyer, Yevheniy Ovcharenko, Daniel E. Rivas, Philipp Schmidt, Sergey Usenko, Robin Santra, and Nora Berrah Phys. Rev. Lett. 127, 213202 (2021) [BibTeX][pdf][abstract]doi:10.1103/PhysRevLett.127.213202
58	Inner-shell-ionization-induced femtosecond structural dynamics of water molecules imaged at an x-ray free-electron laser Till Jahnke, Renaud Guillemin, Ludger Inhester, Sang-Kil Son, Gregor Kastirke, Markus Ilchen, Jonas Rist, Daniel Trabert, Niklas Melzer, Nils Anders, Tommaso Mazza, Rebecca Boll, Alberto De Fanis, Valerija Music, Thorsten Weber, Miriam Weller, Sebastian Eckart, Kilian Fehre, Sven Grundmann, Alexander Hartung, Max Hofmann, Christian Janke, Max Kircher, Giammarco Nalin, Andreas Pier, Juliane Siebert, Nico Strenger, Isabel Vela-Perez, Thomas M. Baumann, Patrik Grychtol, Jacobo Montano, Yevheniy Ovcharenko, Nils Rennhack, Daniel E. Rivas, Rene Wagner, Pawel Ziolkowski, Philipp Schmidt, Tatiana Marchenko, Oksana Travnikova, Loïc Journel, Iyas Ismail, Edwin Kukk, Johannes Niskanen, Florian Trinter, Caterina Vozzi, Michele Devetta, Salvatore Stagira, Mathieu Gisselbrecht, Anna Lena Jäger, Xiang Li, Yubaraj Malakar, Michael Martins, Raimund Feifel, Lothar Ph.H. Schmidt, Achim Czasch, Giuseppe Sansone, Daniel Rolles, Artem Rudenko, Robert Moshammer, Reinhard Dörner, Michael Meyer, Thomas Pfeifer, Markus S. Schöffler, Robin Santra, Marc Simon, and Maria Novella Piancastelli Phys. Rev. X 11, 041044 (2021) [BibTeX][pdf][abstract]doi:10.1103/PhysRevX.11.041044
2020
57	Setting the photoelectron clock through molecular alignment Andrea Trabattoni, Joss Wiese, Umberto De Giovannini, Jean-François Olivieri, Terry Mullins, Jolijn Onvlee, Sang-Kil Son, Biagio Frusteri, Angel Rubio, Sebastian Trippel, and Jochen Küpper Nat. Commun. 11, 2546 (2020) [BibTeX][pdf][abstract]doi:10.1038/s41467-020-16270-0
56	Real-time observation of disintegration processes within argon clusters ionized by a hard-x-ray pulse of moderate fluence Yoshiaki Kumagai, Zoltan Jurek, Weiqing Xu, Hironobu Fukuzawa, Koji Motomura, Denys Iablonskyi, Kiyonobu Nagaya, Shin-ichi Wada, Subhendu Mondal, Tetsuya Tachibana, Yuta Ito, Tsukasa Sakai, Kenji Matsunami, Toshiyuki Nishiyama, Takayuki Umemoto, Christophe Nicolas, Catalin Miron, Tadashi Togashi, Kanade Ogawa, Shigeki Owada, Kensuke Tono, Makina Yabashi, Sang-Kil Son, Beata Ziaja, Robin Santra, and Kiyoshi Ueda Phys. Rev. A 101, 023412 (2020) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.101.023412
55	Breakdown of frustrated absorption in x-ray sequential multiphoton ionization Sang-Kil Son, Rebecca Boll, and Robin Santra Phys. Rev. Res. 2, 023053 (2020) [BibTeX][pdf][abstract]doi:10.1103/PhysRevResearch.2.023053
54	Electronic-structure calculations for nonisothermal warm dense matter John Jasper Bekx, Sang-Kil Son, Beata Ziaja, and Robin Santra Phys. Rev. Res. 2, 033061 (2020) [BibTeX][pdf][abstract]doi:10.1103/PhysRevResearch.2.033061
2019
53	xcalib: a focal spot calibrator for intense X-ray free-electron laser pulses based on the charge state distributions of light atoms Koudai Toyota, Zoltan Jurek, Sang-Kil Son, Hironobu Fukuzawa, Kiyoshi Ueda, Nora Berrah, Benedikt Rudek, Daniel Rolles, Artem Rudenko, and Robin Santra J. Synchrotron Radiat. 26, 1017–1030 (2019) [BibTeX][abstract]doi:10.1107/S1600577519003564
52	Theoretical evidence for the sensitivity to molecular size of charge-rearrangement-enhanced x-ray ionization Yajiang Hao, Ludger Inhester, Sang-Kil Son, and Robin Santra Phys. Rev. A 100, 013402 (2019) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.100.013402
51	Femtosecond-resolved observation of the fragmentation of buckminsterfullerene following X-ray multiphoton ionization Nora Berrah, Alvaro Sanchez-Gonzalez, Zoltan Jurek, Razib Obaid, Hui Xiong, Richard J. Squibb, Timur Osipov, Alberto Lutman, Li Fang, Thomas Barillot, John D. Bozek, James Cryan, Thomas J.A. Wolf, Daniel Rolles, Ryan Coffee, Kirsten Schnorr, Sven Augustin, Hironobu Fukuzawa, Koji Motomura, N. Niebuhr, Leszek J. Frasinski, Raimund Feifel, Claus P. Schulz, Koudai Toyota, Sang-Kil Son, Kiyoshi Ueda, Thomas Pfeifer, Jon P. Marangos, and Robin Santra Nat. Phys. 15, 1279–1283 (2019) [BibTeX][abstract]doi:10.1038/s41567-019-0665-7
2018
50	Radiation-induced chemical dynamics in Ar clusters exposed to strong x-ray pulses Yoshiaki Kumagai, Zoltan Jurek, Weiqing Xu, Hironobu Fukuzawa, Koji Motomura, Denys Iablonskyi, Kiyonobu Nagaya, Shin-ichi Wada, Subhendu Mondal, Tetsuya Tachibana, Yuta Ito, Tsukasa Sakai, Kenji Matsunami, Toshiyuki Nishiyama, Takayuki Umemoto, Christophe Nicolas, Catalin Miron, Tadashi Togashi, Kanade Ogawa, Shigeki Owada, Kensuke Tono, Makina Yabashi, Sang-Kil Son, Beata Ziaja, Robin Santra, and Kiyoshi Ueda Phys. Rev. Lett. 120, 223201 (2018) [BibTeX][pdf][abstract]doi:10.1103/PhysRevLett.120.223201
49	Chemical understanding of the limited site-specificity in molecular inner-shell photofragmentation Ludger Inhester, Bart Oostenrijk, Minna Patanen, Esko Kokkonen, Stephen H. Southworth, Christoph Bostedt, Oksana Travnikova, Tatiana Marchenko, Sang-Kil Son, Robin Santra, Marc Simon, Linda Young, and Stacey L. Sorensen J. Phys. Chem. Lett. 9, 1156–1163 (2018) [BibTeX][abstract]doi:10.1021/acs.jpclett.7b03235
48	Electron and fluorescence spectra of a water molecule irradiated by an x-ray free-electron laser pulse Julia M. Schäfer, Ludger Inhester, Sang-Kil Son, Reinhold F. Fink, and Robin Santra Phys. Rev. A 97, 053415 (2018) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.97.053415
47	Relativistic and resonant effects in the ionization of heavy atoms by ultra-intense hard X-rays Benedikt Rudek, Koudai Toyota, Lutz Foucar, Benjamin Erk, Rebecca Boll, Cédric Bomme, Jonathan Correa, Sebastian Carron, Sébastien Boutet, Garth J. Williams, Ken R. Ferguson, Roberto Alonso-Mori, Jason E. Koglin, Tais Gorkhover, Maximilian Bucher, Carl Stefan Lehmann, Bertold Krässig, Stephen H. Southworth, Linda Young, Christoph Bostedt, Kiyoshi Ueda, Tatiana Marchenko, Marc Simon, Zoltan Jurek, Robin Santra, Artem Rudenko, Sang-Kil Son, and Daniel Rolles Nat. Commun. 9, 4200 (2018) [BibTeX][pdf][abstract]doi:10.1038/s41467-018-06745-6
46	Ab initio calculation of electron-impact-ionization cross sections for ions in exotic electron configurations John Jasper Bekx, Sang-Kil Son, Robin Santra, and Beata Ziaja Phys. Rev. A 98, 022701 (2018) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.98.022701
45	Towards the theoretical limitations of x-ray nanocrystallography at high intensity: the validity of the effective-form-factor description Malik Muhammad Abdullah, Sang-Kil Son, Zoltan Jurek, and Robin Santra IUCrJ 5, 699–705 (2018) [BibTeX][pdf][abstract]doi:10.1107/S2052252518011442
2017
44	Compton spectra of atoms at high x-ray intensity Sang-Kil Son, Otfried Geffert, and Robin Santra J. Phys. B: At. Mol. Opt. Phys. 50, 064003 (2017) [special issue: emerging leaders] [BibTeX][pdf][abstract][link]doi:10.1088/1361-6455/aa59cb
43	Femtosecond response of polyatomic molecules to ultra-intense hard X-rays Artem Rudenko, Ludger Inhester, Kota Hanasaki, Xiang Li, Seyyed J. Robatjazi, Benjamin Erk, Rebecca Boll, Koudai Toyota, Yajiang Hao, Oriol Vendrell, Cedric Bomme, Evgeny Savelyev, Benedikt Rudek, Lutz Foucar, Stephen H. Southworth, Carl S. Lehmann, Bertold Krässig, Tatiana Marchenko, Marc Simon, Kiyoshi Ueda, Ken R. Ferguson, Maximilian Bucher, Tais Gorkhover, Sebastian Carron, Roberto Alonso-Mori, Jason E. Koglin, Jonathan Correa, Garth J. Williams, Sébastien Boutet, Linda Young, Christoph Bostedt, Sang-Kil Son, Robin Santra, and Daniel Rolles Nature 546, 129–132 (2017) [BibTeX][abstract][link]doi:10.1038/nature22373
42	Interplay between relativistic energy corrections and resonant excitations in x-ray multiphoton ionization dynamics of Xe atoms Koudai Toyota, Sang-Kil Son, and Robin Santra Phys. Rev. A 95, 043412 (2017) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.95.043412
41	Molecular-dynamics approach for studying the nonequilibrium behavior of x-ray-heated solid-density matter Malik Muhammad Abdullah, Anurag, Zoltan Jurek, Sang-Kil Son, and Robin Santra Phys. Rev. E 96, 023205 (2017) [BibTeX][pdf][abstract]doi:10.1103/PhysRevE.96.023205
2016
40	XMDYN and XATOM: versatile simulation tools for quantitative modeling of X-ray free-electron laser induced dynamics of matter Zoltan Jurek, Sang-Kil Son, Beata Ziaja, and Robin Santra J. Appl. Cryst. 49, 1048–1056 (2016) [special issue on free-electron laser software] [BibTeX][abstract]doi:10.1107/S1600576716006014
39	Kinetic Boltzmann approach adapted for modeling highly ionized matter created by x-ray irradiation of a solid Beata Ziaja, Vikrant Saxena, Sang-Kil Son, Nikita Medvedev, Benjamin Barbrel, Bianca Woloncewicz, and Michal Stransky Phys. Rev. E 93, 053210 (2016) [BibTeX][pdf][abstract]doi:10.1103/PhysRevE.93.053210
38	Calculation of x-ray scattering patterns from nanocrystals at high x-ray intensity Malik Muhammad Abdullah, Zoltan Jurek, Sang-Kil Son, and Robin Santra Struct. Dyn. 3, 054101 (2016) [BibTeX][pdf][abstract]doi:10.1063/1.4958887
37	X-ray multiphoton ionization dynamics of a water molecule irradiated by an x-ray free-electron laser pulse Ludger Inhester, Kota Hanasaki, Yajiang Hao, Sang-Kil Son, and Robin Santra Phys. Rev. A 94, 023422 (2016) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.94.023422
2015
36	Efficient electronic structure calculation for molecular ionization dynamics at high x-ray intensity Yajiang Hao, Ludger Inhester, Kota Hanasaki, Sang-Kil Son, and Robin Santra Struct. Dyn. 2, 041707 (2015) [special issue on biology with x-ray lasers 2] [BibTeX][pdf][abstract]doi:10.1063/1.4919794
35	Nanoplasma formation by high intensity hard x-rays Tetsuya Tachibana, Zoltan Jurek, Hironobu Fukuzawa, Koji Motomura, Kiyonobu Nagaya, Shin-ichi Wada, Per Johnsson, Marco Siano, S. Mondal, Yuta Ito, M. Kimura, T. Sakai, K. Matsunami, H. Hayashita, J. Kajikawa, Xiao-Jing Liu, E. Robert, Catalin Miron, Raimund Feifel, John P. Marangos, Kensuke Tono, Yuichi Inubushi, Makina Yabashi, Sang-Kil Son, Beata Ziaja, Makoto Yao, Robin Santra, and Kiyoshi Ueda Sci. Rep. 5, 10977 (2015) [BibTeX][pdf][abstract]doi:10.1038/srep10977
34	Towards RIP using free electron laser SFX data Lorenzo Galli, Sang-Kil Son, Thomas A. White, Robin Santra, Henry N. Chapman, and Max H. Nanao J. Synchrotron Radiat. 22, 249–255 (2015) [BibTeX][abstract]doi:10.1107/S1600577514027854
33	Towards phasing using high x-ray intensity Lorenzo Galli, Sang-Kil Son, Thomas R.M. Barends, Thomas A. White, Anton Barty, Sabine Botha, Sébastien Boutet, Carl Caleman, Bruce R. Doak, Max H. Nanao, Karol Nass, Robert L. Schoeman, Nicusor Timneanu, Robin Santra, Ilme Schlichting, and Henry N. Chapman IUCrJ 2, 627–634 (2015) [BibTeX][pdf][abstract]doi:10.1107/S2052252515014049
32	Towards realistic simulations of macromolecules irradiated under the conditions of coherent diffraction imaging with an x-ray free-electron laser Beata Ziaja, Zoltan Jurek, Nikita Medvedev, Vikrant Saxena, Sang-Kil Son, and Robin Santra Photonics 2, 256–269 (2015) [BibTeX][pdf][abstract]doi:10.3390/photonics2010256
31	Electronic damage in S atoms in a native protein crystal induced by an intense x-ray free-electron laser pulse Lorenzo Galli, Sang-Kil Son, M. Klinge, S. Bajt, A. Barty, R. Bean, C. Betzel, K. R. Beyerlein, C. Caleman, R. B. Doak, M. Duszenko, H. Fleckenstein, C. Gati, B. Hunt, R. A. Kirian, M. Liang, M. H. Nanao, K. Nass, D. Oberthür, L. Redecke, R. Shoeman, F. Stellato, C. H. Yoon, T. A. White, O. Yefanov, J. Spence, and H. N. Chapman Struct. Dyn. 2, 041703 (2015) [special issue on biology with x-ray lasers 2] [BibTeX][pdf][abstract]doi:10.1063/1.4919398
2014
30	Quantum-mechanical calculation of ionization potential lowering in dense plasmas Sang-Kil Son, Robert Thiele, Zoltan Jurek, Beata Ziaja, and Robin Santra Phys. Rev. X 4, 031004 (2014) [BibTeX][pdf][abstract]doi:10.1103/PhysRevX.4.031004
29	Femtosecond x-ray-induced explosion of C₆₀ at extreme intensity Brendan Murphy, Timur Osipov, Zoltan Jurek, Li Fang, Sang-Kil Son, Melanie Mucke, John H.D. Eland, Vitali Zhaunerchyk, Raimund Feifel, Lorenzo Avaldi, Paola Bolognesi, Christoph Bostedt, J. D. Bozek, Jakob Grilj, Markus Guehr, Leszek J. Frasinski, James Glownia, Dang Trinh Ha, Kay Hoffmann, Edwin Kukk, Brian K. McFarland, Catalin Miron, Emily Sistrunk, Richard J. Squibb, Kiyoshi Ueda, Robin Santra, and Nora Berrah Nat. Commun. 5, 4281 (2014) [BibTeX][pdf][abstract]doi:10.1038/ncomms5281
28	Incoherent x-ray scattering in single molecule imaging Jan Malte Slowik, Sang-Kil Son, Gopal Dixit, Zoltan Jurek, and Robin Santra New J. Phys. 16, 073042 (2014) [BibTeX][pdf][abstract]doi:10.1088/1367-2630/16/7/073042
2013
27	Breakdown of the x-ray resonant magnetic scattering signal during intense pulses of extreme ultraviolet free-electron-laser radiation L. Müller, C. Gutt, B. Pfau, S. Schaffert, J. Geilhufe, F. Büttner, J. Mohanty, S. Flewett, R. Treusch, S. Düsterer, H. Redlin, A. Al-Shemmary, M. Hille, A. Kobs, R. Frömter, H. P. Oepen, B. Ziaja, N. Medvedev, Sang-Kil Son, R. Thiele, R. Santra, W. Schlotter, B. Vodungbo, J. Lüning, S. Eisebitt, and G. Grübel Phys. Rev. Lett. 110, 234801 (2013) [BibTeX][pdf][abstract]doi:10.1103/PhysRevLett.110.234801
26	Deep inner-shell multiphoton ionization by intense x-ray free-electron laser pulses H. Fukuzawa, Sang-Kil Son, K. Motomura, S. Mondal, K. Nagaya, S. Wada, X. -J. Liu, R. Feifel, T. Tachibana, Y. Ito, M. Kimura, T. Sakai, K. Matsunami, H. Hayashita, J. Kajikawa, P. Johnsson, M. Siano, E. Kukk, B. Rudek, B. Erk, L. Foucar, E. Robert, C. Miron, K. Tono, Y. Inubushi, T. Hatsui, M. Yabashi, M. Yao, R. Santra, and K. Ueda Phys. Rev. Lett. 110, 173005 (2013) [BibTeX][pdf][abstract]doi:10.1103/PhysRevLett.110.173005
25	Resonance-enhanced multiple ionization of krypton at an x-ray free-electron laser Benedikt Rudek, Daniel Rolles, Sang-Kil Son, Lutz Foucar, Benjamin Erk, Sascha Epp, Rebecca Boll, Denis Anielski, Christoph Bostedt, Sebastian Schorb, Ryan Coffee, John Bozek, Sebastian Trippel, Tatiana Marchenko, Marc Simon, Lauge Christensen, Sankar De, Shin-ichi Wada, Kiyoshi Ueda, Ilme Schlichting, Robin Santra, Joachim Ullrich, and Artem Rudenko Phys. Rev. A 87, 023413 (2013) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.87.023413
24	Photoelectron spectroscopy method to reveal ionization potential lowering in nanoplasmas Beata Ziaja, Zoltan Jurek, Nikita Medvedev, Sang-Kil Son, Robert Thiele, and Sven Toleikis J. Phys. B: At. Mol. Opt. Phys. 46, 164009 (2013) [special issue on frontiers of free-electron laser science] [BibTeX][abstract]doi:10.1088/0953-4075/46/16/164009
23	Determination of multiwavelength anomalous diffraction coefficients at high x-ray intensity Sang-Kil Son, Henry N. Chapman, and Robin Santra J. Phys. B: At. Mol. Opt. Phys. 46, 164015 (2013) [special issue on frontiers of free-electron laser science] [BibTeX][pdf][abstract][link]doi:10.1088/0953-4075/46/16/164015
22	Sequential multiphoton multiple ionization of atomic argon and xenon irradiated by x-ray free-electron laser pulses at SACLA K. Motomura, H. Fukuzawa, Sang-Kil Son, S. Mondal, T. Tachibana, Y. Ito, M. Kimura, K. Nagaya, T. Sakai, K. Matsunami, S. Wada, H. Hayashita, J. Kajikawa, X. -J. Liu, R. Feifel, P. Johnsson, M. Siano, E. Kukk, B. Rudek, B. Erk, L. Foucar, E. Robert, C. Miron, K. Tono, Y. Inubushi, T. Hatsui, M. Yabashi, M. Yao, R. Santra, and K. Ueda J. Phys. B: At. Mol. Opt. Phys. 46, 164024 (2013) [special issue on frontiers of free-electron laser science] [BibTeX][abstract]doi:10.1088/0953-4075/46/16/164024
21	Recombination-amplitude calculations of noble gases, in both length and acceleration forms, beyond the strong-field approximation Siddharth Bhardwaj, Sang-Kil Son, Kyung-Han Hong, Chien-Jen Lai, Franz X. Kärtner, and Robin Santra Phys. Rev. A 88, 053405 (2013) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.88.053405
2012
20	Enhanced nonlinear response of Ne⁸⁺ to intense ultrafast x rays Arina Sytcheva, Stefan Pabst, Sang-Kil Son, and Robin Santra Phys. Rev. A 85, 023414 (2012) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.85.023414
19	Ultra-efficient ionization of heavy atoms by intense x-ray free-electron laser pulses Benedikt Rudek, Sang-Kil Son, Lutz Foucar, Sascha W. Epp, Benjamin Erk, Robert Hartmann, Marcus Adolph, Robert Andritschke, Andrew Aquila, Nora Berrah, Christoph Bostedt, John Bozek, Nicola Coppola, Frank Filsinger, Hubert Gorke, Tais Gorkhover, Heinz Graafsma, Lars Gumprecht, Andreas Hartmann, Günter Hauser, Sven Herrmann, Helmut Hirsemann, Peter Holl, André Hömke, Loic Journel, Christian Kaiser, Nils Kimmel, Faton Krasniqi, Kai-Uwe Kühnel, Michael Matysek, Marc Messerschmidt, Danilo Miesner, Thomas Möller, Robert Moshammer, Kiyonobu Nagaya, Björn Nilsson, Guillaume Potdevin, Daniel Pietschner, Christian Reich, Daniela Rupp, Gerhard Schaller, Ilme Schlichting, Carlo Schmidt, Florian Schopper, Sebastian Schorb, Claus-Dieter Schröter, Joachim Schulz, Marc Simon, Heike Soltau, Lothar Strüder, Kiyoshi Ueda, Georg Weidenspointner, Robin Santra, Joachim Ullrich, Artem Rudenko, and Daniel Rolles Nat. Photon. 6, 858–865 (2012) [BibTeX][abstract]doi:10.1038/nphoton.2012.261
18	Evidence for interatomic Coulombic decay in Xe K-shell-vacancy decay of XeF₂ R. W. Dunford, S. H. Southworth, D. Ray, E. P. Kanter, B. Krässig, L. Young, D. A. Arms, E. M. Dufresne, D. A. Walko, O. Vendrell, Sang-Kil Son, and R. Santra Phys. Rev. A 86, 033401 (2012) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.86.033401
17	Monte Carlo calculation of ion, electron, and photon spectra of xenon atoms in x-ray free-electron laser pulses Sang-Kil Son and Robin Santra Phys. Rev. A 85, 063415 (2012) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.85.063415
16	Effect of screening by external charges on the atomic orbitals and photoinduced processes within the Hartree-Fock-Slater atom Robert Thiele, Sang-Kil Son, Beata Ziaja, and Robin Santra Phys. Rev. A 86, 033411 (2012) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.86.033411
2011
15	Voronoi-cell finite difference method for accurate electronic structure calculation of polyatomic molecules on unstructured grids Sang-Kil Son J. Comput. Phys. 230, 2160–2173 (2011) [BibTeX][pdf][abstract]doi:10.1016/j.jcp.2010.12.012
14	Impact of hollow-atom formation on coherent x-ray scattering at high intensity Sang-Kil Son, Linda Young, and Robin Santra Phys. Rev. A 83, 033402 (2011) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.83.033402
13	Nonlinear atomic response to intense ultrashort x rays Gilles Doumy, C. Roedig, Sang-Kil Son, C. I. Blaga, A. D. DiChiara, Robin Santra, N. Berrah, C. Bostedt, J. D. Bozek, P. H. Bucksbaum, J. P. Cryan, L. Fang, S. Ghimire, J. M. Glownia, M. Hoener, E. P. Kanter, B. Krässig, M. Kuebel, M. Messerschmidt, G. G. Paulus, D. A. Reis, N. Rohringer, L. Young, P. Agostini, and L. F. DiMauro Phys. Rev. Lett. 106, 083002 (2011) [BibTeX][pdf][abstract]doi:10.1103/PhysRevLett.106.083002
12	Multiwavelength anomalous diffraction at high x-ray intensity Sang-Kil Son, Henry N. Chapman, and Robin Santra Phys. Rev. Lett. 107, 218102 (2011) [BibTeX][pdf][abstract]doi:10.1103/PhysRevLett.107.218102
2008–2010
11	Probing the origin of elliptical high-order harmonic generation from aligned molecules in linearly polarized laser ﬁelds Sang-Kil Son, Dmitry A. Telnov, and Shih-I Chu Phys. Rev. A 82, 043829 (2010) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.82.043829
10	Floquet formulation for the investigation of multiphoton quantum interference in a superconducting qubit driven by a strong ac field Sang-Kil Son, Siyuan Han, and Shih-I Chu Phys. Rev. A 79, 032301 (2009) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.79.032301
9	Multielectron effects on the orientation dependence and photoelectron angular distribution of multiphoton ionization of CO₂ in strong laser fields Sang-Kil Son and Shih-I Chu Phys. Rev. A 80, 011403(R) (2009) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.80.011403
8	Theoretical study of orientation-dependent multiphoton ionization of polyatomic molecules in intense ultrashort laser fields: A new time-dependent Voronoi-cell finite difference method Sang-Kil Son and Shih-I Chu Chem. Phys. 366, 91–102 (2009) [BibTeX][pdf][abstract]doi:10.1016/j.chemphys.2009.09.006
7	Ab initio theoretical investigation of the frequency comb structure and coherence in the vuv-xuv regimes via high-order harmonic generation Juan J. Carrera, Sang-Kil Son, and Shih-I Chu Phys. Rev. A 77, 031401(R) (2008) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.77.031401
6	Many-mode Floquet theoretical approach for coherent control of multiphoton dynamics driven by intense frequency-comb laser fields Sang-Kil Son and Shih-I Chu Phys. Rev. A 77, 063406 (2008) [BibTeX][pdf][abstract]doi:10.1103/PhysRevA.77.063406
1999–2002
5	Effects of intramolecular basis set superposition error on conformational energy difference of 1,2-difluoroethane and 1,2-dimethoxyethane Young-Kyu Han, Kyoung Hoon Kim, Sang-Kil Son, and Yoon Sup Lee Bull. Korean Chem. Soc. 23, 1267–1271 (2002) [BibTeX][pdf][abstract]doi:10.5012/bkcs.2002.23.9.1267
4	Unusual ferromagnetic couplings in single end-to-end azide-bridged cobalt(II) and nickel(II) chain systems Chang Seop Hong, Ja-eung Koo, Sang-Kil Son, Yoon Sup Lee, Yaung-Soo Kim, and Youngkyu Do Chem. Eur. J. 7, 4243–4252 (2001) [BibTeX][abstract]doi:10.1002/1521-3765(20011001)7:19%3C4243::AID-CHEM4243%3E3.0.CO;2-U
3	Spin-orbit effects on the transactinide p-block element monohydrides MH (M=element 113-118) Young-Kyu Han, Cheolbeom Bae, Sang-Kil Son, and Yoon Sup Lee J. Chem. Phys. 112, 2684–2691 (2000) [BibTeX][abstract]doi:10.1063/1.480842
2	High-dimensional manganese(II) compounds with noncovalent and/or covalent bonds derived from flexible ligands: Self-assembly and structural transformation Chang Seop Hong, Sang-Kil Son, Yoon Sup Lee, Moo-Jin Jun, and Youngkyu Do Inorg. Chem. 38, 5602–5610 (1999) [BibTeX][abstract]doi:10.1021/ic990611w
1	Structures and stabilities for halides and oxides of transactinide elements Rf, Db, and Sg calculated by relativistic effective core potential methods Young-Kyu Han, Sang-Kil Son, Yoon Jeong Choi, and Yoon Sup Lee J. Phys. Chem. A 103, 9109–9115 (1999) [BibTeX][abstract]doi:10.1021/jp9917953

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