Femtosecond Spectroscopy and X-ray Spectroscopy Group

The Femtosecond Spectroscopy and X-ray Spectroscopy Group has been applying spectroscopy techniques based on synchrotron radiation, aiming to study electronic bistability and metastable excited states in transition metal compounds, as well as the electronic structure of oxides with correlated electrons. Recently, our main activity shifted to applying X-ray spectroscopy as probes to study ultrafast structural and electronic dynamics in pump-probe experiments, with ps and fs resolution. This research is complemented by theoretical and femtosecond laser studies in our institute. We have realized a transient optical absorption setup, and we are currently building a time-resolved fluorescence and a stimulated Raman scattering setup. The research opportunities offered by our complementary laser, X-ray and theory programme allows us to efficiently tackle ultrafast dynamics of molecular systems in the condensed phase.



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Bajnóczi, Éva		Post-doctoral fellow
Baranyai, Péter		Research fellow
Bazsó, Gábor		Research fellow
Bogdán, Csilla		Research fellow
Deák, László		Senior research fellow
Keszthelyi, Tamás	Senior research fellow
Mikeházi, Anton	      Research assistant
Németh, Zoltán		Senior research fellow
Pápai, Mátyás	        Post-doctoral fellow
Papp, Mariann		PhD student
Rozgonyi, Tamás		Senior research fellow
Szemes, Dorottya	PhD student
Vancza, Andor	            Research assistant
Vankó, György		Senior research fellow, head of group
Vereb, Katalin		Project manager

Graduated students

Sipos Gábor		M.Sc. in Chemical engineering, BME (2020)
Vancza, Andor		B.Sc. in Chemical engineering, BME (2018)
Kapás, Fanni		M.Sc. in Chemical engineering, BME (2017)
Pápai, Mátyás		PhD in Physical Chemistry, ELTE (2015)
Herczeg, Viktória	B.Sc. in Physics, ELTE (2014)
Szabó, András		M.Sc. in Physics, SZTE (2012)

Former members

Bordage, Amélie		Post-doctoral fellow (Feb. 2011 - Dec. 2012) 
Raiola, Francesco	Post-doctoral fellow (Nov. 2012 - July 2013)
Rozipál, Gábor		Research assistant  (Sept. 2012 - Apr. 2013)
Rozsályi, Emese		Post-doctoral fellow (Sep. 2013 - Aug. 2016)
Sas, Norbert		PhD student (2009-2012)           
Szabó, András		Research Assistant (2012 - Aug. 2014)
A substantial part of our research is done at synchrotron radiation facilities and X-ray free electron lasers. Current research topics include studying transition metal oxides with correlated electrons, switchable metal complexes, and ultrafast transitions applying X-ray spectroscopy as probes.

Using ERC support, we have built a laboratory to develop X-ray optics and X-ray spectroscopy. With the Lendület (Momentum) grant of the HAS, we have realized a pump-probe setup in the Wigner RCP, which allows us to record transient optical absorption with femtosecond time resolution. With the help of the running grants from the national excellency programmes VEKOP and NKP, we are realizing further instrumentation for time-resolved probes, including fluorescence and stimulated Raman scattering.
From these fundings we have also built up a computer cluster to carry out quantum chemistry and dynamics calculations.

The combination of the above capabilities allows us to make efforts at theory-aided engineering of functional molecules, with experimental verification.

In addition, our group shares a Mössbauer spectroscopy laboratory with the Functional Nanostructures Group. This laboratory is equipped with several spectrometers for transmission and emission Mössbauer spectroscopy studies (MES). We run a chemistry laboratory and two isotope laboratories. We have access to other facilities on the KFKI campus through several collaborations with other groups.

“Lendület” (Momentum) Programme of the Hungarian Academy of Sciences: "Functional molecules caught in the act: Electronic structure – function relationships studied by femtosecond spectroscopy", G. Vankó, 2013 – 2018, 2018 – 2019, 2020 (in this year the financing were taken over by the ELKH)
VEKOP_2.3.2-16-2017-00015 Strategical R&D Excellence program, "Ultrafast molecular and nanooptical switches", G. Vankó, P. Dombi, 2017 – 2021
ERC Starting Grant (consolidating phase) ERC-StG 259709, "X-cited! : Electronic transitions and bistability: states, switches, transitions and dynamics studied with high-resolution X-ray spectroscopy", G. Vankó, 2010 – 2015

Funding ID of other running projects
National Research, Development and Innovation Fund (NKFIH FK 124460), "Understanding and Controlling the Interplay of Local and Remote Interactions in Transition Metal Compounds with High Potential in IT", PI: Z. Németh, 2018 – 2021
National Research, Development and Innovation Fund (NKFIH PD 131845), "Unveiling the correlations of structure and charge-transfer excited state electronic properties in functional model molecules", PI: É. G. Bajnóczi, 2019 – 2022
National Research, Development and Innovation Fund (NKFIH PD 134976), "Manipulation of excited-state relaxation pathways in functional transition metal complexes", PI: M. Pápai, 2020 – 2023
National Research, Development and Innovation Office (SNN 135636), "Developing tender X-ray spectroscopy probes to tackle problems in materials science and
ultrafast science", a bilateral project with M. Kavčič from the Jožef Stefan Institute, Ljubljana, Slovenia (supported by the Slovenian Research Agency); PI: G. Vankó, 2020 – 2023
National Research, Development and Innovation Office, National Excellence Program (2018-1.2.1-NKP-2018-00012), "Ultrafast experiments for better functional molecules, nanocircuits and atomic beams", PI: P. Dombi, 2018 – 2022; within this project we have a work package to realize femtosecond-resolved stimulated Raman scattering experiments

Quantum-chemistry-aided ligand engineering for potential molecular switches: changing barriers to tune excited state lifetimes
Substitution of terpyridine at the 4′ position with electron withdrawing and donating groups is used to tune the quintet lifetime of its iron(II) complex. DFT calculations suggest that the energy barrier between the quintet and singlet states can be altered significantly upon substitution, inducing a large variation of the lifetime of the photoexcited quintet state. This prediction was experimentally verified by transient optical absorption spectroscopy and good agreement with the trend expected from the calculations was found. This demonstrates that the potential energy landscape can indeed be rationally tailored by relevant modifications based on DFT predictions. This result should pave the way to advancing efficient theory-based ligand engineering of functional molecules to a wide range of applications.
D. Sárosiné Szemes, T. Keszthelyi, M. Papp, L. Varga, G. Vankó Chem. Commun. 56 (2020) 11831

Laboratory X-ray absorption spectroscopy
A new, easily operated high resolution von Hámos type X-ray spectrometer has been developed, which offers rapid transmission experiments for X-ray absorption on concentrated (routine) samples in the laboratory, replacing the need for synchrotron studies. We demonstrated the proof of principle and give examples for applications in solids and in solutions.
Z. Németh et al. Laboratory von Hámos X-ray Spectroscopy for Routine Sample Characterization, arXiv:1607.08045
É. Bajnóczi et al. Simultaneous Speciation, Structure, and Equilibrium Constant Determination in the Ni2+ – EDTA – CN Ternary System
Z. Németh et al. Laboratory EXAFS determined structure of the stable complexes in the ternary Ni(II)–EDTA–CN− system

Insights into the function of a light-harvesting model system
Ultrafast photoinduced electron transfer preceding energy equilibration still poses many experimental and conceptual challenges to the optimization of photoconversion since an atomic-scale description has so far been beyond reach. Here we combine femtosecond transient optical absorption spectroscopy with ultrafast X-ray emission spectroscopy and diffuse X-ray scattering at the SACLA facility to track the non-equilibrated electronic and structural dynamics within a bimetallic donor–acceptor complex that contains an optically dark centre. Exploiting the 100-fold increase in temporal resolution as compared with storage ring facilities, these measurements constitute the first X-ray-based visualization of a non-equilibrated intramolecular electron transfer process over large interatomic distances. Experimental and theoretical results establish that mediation through electronically excited molecular states is a key mechanistic feature. The present study demonstrates the extensive potential of femtosecond X-ray techniques as diagnostics of non-adiabatic electron transfer processes in synthetic and biological systems, and some directions for future studies, are outlined.
Read paper "Visualizing the non-equilibrium dynamics of photoinduced intramolecular electron transfer with femtosecond X-ray pulses" at Nature Communications,
or the press release by our colleagues at Lund University

Tracking excited-state charge and spin dynamics in iron coordination complexes
Photo-induced spin-state transition of molecular compounds of iron has great potential for applications in molecular devices. The low to high spin excitation in Fe(II) compounds involves flipping two electron spins in less than 300 femtosecond. Therefore, the detailed mechanism of the ultrafast spin switching has been ill-understood due to the lack of proper tools to provide insights in the ultrashort time window. We have managed to close this knowledge gap exploiting the spin momentum sensitivity of X-ray emission spectroscopy at the Linac Coherent Light Source, the first hard X-ray free electron laser (at the Stanford Linear Accelerator Center, USA), in a pioneering experiment using 100 femtosecond time resolution. We were able to determine the de-excitation sequence for a benchmark Fe(II) molecule showing a singlet to quintet transition, establishing the critical role of intermediate triplet spin states in the transition mechanism.
Read paper "Tracking excited-state charge and spin dynamics in iron coordination complexes" at Nature

On the microscopic origin of the nanoscale magnetic-electronic phase separation in LSCO
Investigating the roots of a nanoscale magneto-electronic phase separation (responsible for their magnetoresistance as well as cooperative electric and magnetic phase transitions) in bulk Sr-doped LaCoO3 (LSCO), we have combined local spectroscopic techniques as synchrotron XES and laboratory Mössbauer spectroscopy to identify and characterize the clusterization process. A simple model based on the random distribution of the doping Sr ions describes well both the doping-driven evolution of the separated phases and the variation of the Co spin state.
Read paper "Microscopic origin of the nanoscale magnetic-electronic phase separation in LSCO" at Phys. Rev. B 88 (2013) 035125 by Z. Németh et al.

Read some more highlights here

X-ray Spectroscopy Laboratory (responsible: Németh, Zoltán)

- a mature high-energy resolution X-ray absorption spectrometer for XANES and EXAFS in transmission mode
(see the paper Laboratory von Hámos X-ray Spectroscopy for Routine Sample Characterization, and another two on liquid phase XANES, and EXAFS (in the ternary Ni(II)–EDTA–CN− system))

- a high-energy resolution spectrometer for X-ray emission (XES), under development

Femtosecond Laser Laboratory (responsible: Keszthelyi, Tamás)

- femtosecond-resolved transient optical absorption spectroscopy
(D. Sárosiné Szemes, T. Keszthelyi, M. Papp, L. Varga, G. Vankó Quantum-chemistry-aided Ligand Engineering for Potential Molecular Switches: Changing Barriers to Tune Excited State Lifetimes
Chem. Commun. 56 (2020) 11831 )

- further instrumentation, including fluorescence and stimulated Raman scattering, is under development

Mössbauer Laboratories (responsible: Németh, Zoltán)

- several spectrometers for transmission and emission Mössbauer spectroscopy studies

Chemistry and isotope laboratories (responsible: Bogdán, Csilla)

A computer cluster with 336 nodes to carry out quantum chemistry and quantum dynamics calculations



D. Sárosiné Szemes, T. Keszthelyi, M. Papp, L. Varga, G. Vankó
Quantum-chemistry-aided Ligand Engineering for Potential Molecular Switches: Changing Barriers to Tune Excited State Lifetimes
Chem. Commun. 56 (2020) 11831

K. Kunnus, M. Vacher, T. C. B. Harlang, K. S. Kjær, K. Haldrup, E. Biasin, T. B. van Driel, M. Pápai, P. Chabera, Y. Liu, H. Tatsuno, C. Timm, E. Källman, M. Delcey, R. W. Hartsock, M. E. Reinhard, S. Koroidov, M. G. Laursen, F. B. Hansen, P. Vester, M. Christensen, L. Sandberg, Z. Németh, D. Sárosiné Szemes, É. G. Bajnóczi, R. Alonso-Mori, J. M. Glownia, S. Nelson, M. Sikorski, D. Sokaras, H. T. Lemke, S. Canton, K. B. Møller, M. M. Nielsen, G. Vankó, K. Wärnmark, V. Sundström, P. Persson, M. Lundberg, J.Uhlig, K. J.
Vibrational wavepacket dynamics in Fe carbene photosensitizer determined with femtosecond X-ray emission and scattering
Nature Communications 11 (2020) 634 arXiv:1910.13099

Tatsuno, H.; Kjaer, K. S.; Kunnus, K.; Harlang, T.; Timm, C.; Guo, M.; Chabera, P.; Fredin, L.; Hartsock, R.; Reinhard, M.; Koroidov, S.; Li, L.; Cordones, A.; Gordivska, O.; Prakash, O.; Liu, Y.; Laursen, M.; Biasin, E.; Hansen, F. B.; Vester, P.; Christensen, M.; Haldrup, K.; Németh, Z.; Sárosiné Szemes, D.; Bajnóczi, É.; Vankó, G.; van Driel, T.; Alonso-Mori, R.; Glownia, J.; Nelson, S.; Sikorski, M.; Lemke, H.; Sokaras, D.; Canton, S. E.; Ougaard Dohn, A.; Møller, K. B.; Nielsen, M. M.; Gaffney, K. J.; Wärnmark, K.; Sundström, V.; Persson, P. & Uhlig, J.
Hot branching dynamics in a light‐harvesting iron carbene complex revealed by ultrafast x‐ray emission spectroscopy
Angew. Chem. Int. Ed. 59 (2020) 364

Liu YS, Horton SL, Yang J, Nunes JPF, Shen XZ, Wolfe TJA, Forbes R, Cheng C, Moore B, Centurion M, Hegazy K, Li RK, Lin MF, Stolow A, Hockett P, Rozgonyi T, Marquetande P, Wang XJ, Weinacht T
Spectroscopic and Structural Probing of Excited-State Molecular Dynamics with Time-Resolved Photoelectron Spectroscopy and Ultrafast Electron Diffraction
Phys. Rev. X 10 (2020) 021016.

Brian Kaufman, Tamás Rozgonyi, Philipp Marquetand, and Thomas Weinacht
Coherent Control of Internal Conversion in Strong-Field Molecular Ionization
Phys. Rev. Lett. 125 (2020) 05320210.


Tetsuo Katayama, Thomas Northey, Wojciech Gawelda, Christopher J. Milne, György Vankó, Frederico A. Lima, Rok Bohinc, Zoltán Németh, Shunsuke Nozawa, Tokushi Sato, Dmitry Khakhulin, Jakub Szlachetko, Tadashi Togashi, Shigeki Owada, Shin-ichi Adachi, Christian Bressler, Makina Yabashi & Thomas J. Penfold
Tracking multiple components of a nuclear wavepacket in photoexcited Cu(I)-phenanthroline complex using ultrafast X-ray spectroscopy
Nature Communications 10 (2019) 3606

Z. Németh, É. G. Bajnóczi, C. Bogdán, G. Vankó
Laboratory EXAFS determined structure of the stable complexes in the ternary Ni(II)–EDTA–CN system
Phys. Chem. Chem. Phys. 18 (2019) 9239-9245

K. S. Kjær, Tim B. van Driel, T. C. B. Harlang, K. Kunnus, K. Ledbetter, R. Hartsock, M. E. Reinhard, S. Koroidov, l. li, M. G. Laursen, E. Biasin, F. B. Hansen, P. Vester, M. Christensen, K. Haldrup, M. M. Nielsen, A. Dohn, M. Pápai, K. B. Møller, P. Chabera, Y. Liu, H. Tatsuno, C. Timm, M. Jarenmark, J. Uhlig, V. Sundstrom, K. Warnmark, P. Persson, Z. Németh, D. Sárosiné Szemes, É. G. Bajnóczi, G. Vankó, R. Alonso Mori, J. M. Glownia, S. Nelson, M. Sikorski, D. Sokaras, S. E. Canton, H. Lemke and K. Gaffney
Finding Intersections between Electronic Excited State Potential Energy Surfaces with Simultaneous Ultrafast X-ray Scattering and Spectroscopy
Chem. Sci., 2019, 10, 5749-5760

March, A. M.; Doumy, G.; Andersen, A.; Al Haddad, A.; Kumagai, Y.; Tu, M.-F.; Bang, J.; Bostedt, C.; Uhlig, J.; Nascimento, D. R.; Assefa, T. A.; Németh, Z.; Vankó, G.; Gawelda, W.; Govind, N. & Young, L.
Elucidation of the photoaquation reaction mechanism in ferrous hexacyanide using synchrotron x-rays with sub-pulse-duration sensitivity
J. Chem. Phys. 151 (2019) 144306

Britz, A.; Gawelda, W.; Assefa, T. A.; Jamula, L. L.; Yarranton, J. T.; Galler, A.; Khakhulin, D.; Diez, M.; Harder, M.; Doumy, G.; March, A. M.; Bajnóczi, É.; Németh, Z.; Pápai, M.; Rozsályi, E.; Sárosiné Szemes, D.; Cho, H.; Mukherjee, S.; Liu, C.; Kim, T. K.; Schoenlein, R. W.; Southworth, S. H.; Young, L.; Jakubikova, E.; Huse, N.; Vankó, G.; Bressler, C. & McCusker, J. K.
Using Ultrafast X-ray Spectroscopy To Address Questions in Ligand-Field Theory: The Excited State Spin and Structure of [Fe(dcpp)2]2+
Inorg. Chem. 58 (2019) 9341-9350

Pápai, M. ; Rozgonyi, T. ; Penfold, T.J. ; Nielsen, M.M. ; Møller, K.B.
Simulation of ultrafast excited-state dynamics and elastic x-ray scattering by quantum wavepacket dynamics
J. Chem. Phys. 151 (2019) 144307

Horton, S.L. ; Liu, Y. ; Forbes, R. ; Makhija, V. ; Lausten, R. ; Stolow, A. ; Hockett, P. ; Marquetand, P. ; Rozgonyi, T. ; Weinacht, T.
Excited state dynamics of CH 2 I 2 and CH 2 BrI studied with UV pump VUV probe photoelectron spectroscopy
J. Chem. Phys. 150 (2019) 174201

Weis, C.; Spiekermann, G.; Sternemann, C.; Harder, M.; Vankó, G.; Cerantola, V.; Sahle, C. J.; Forov, Y.; Sakrowski, R.; Kupenko, I.; Petitgirard, S.; Yavaş, H.; Bressler, C.; Gawelda, W.; Tolan, M., Wilke, M.
Combining X-ray Kβ1,3, valence-to-core, and X-ray Raman spectroscopy for studying Earth materials at high pressure and temperature: the case of siderite
J. Anal. At. Spectrom. 34 (2019) 384-393


J. A. Wolny, V. Schünemann, Z. Németh, G. Vankó
Spectroscopic techniques to characterise the spin state: vibrational, optical, Mössbauer, NMR and X-ray spectroscopy
Comptes Rendus Chimie 21 (2018) 1152-1169.

Kjær, K. S.; Kunnus, K.; Harlang, T. C. B.; Van Driel, T. B.; Ledbetter, K.; Hartsock, R. W.; Reinhard, M. E.; Koroidov, S.; Li, L.; Laursen, M. G.; Biasin, E.; Hansen, F. B.; Vester, P.; Christensen, M.; Haldrup, K.; Nielsen, M. M.; Chabera, P.; Liu, Y.; Tatsuno, H.; Timm, C.; Uhlig, J.; Sundström, V.; Németh, Z.; Sárosiné Szemes, D.; Bajnóczi, É.; Vankó, G.; Alonso-Mori, R.; Glownia, J. M.; Nelson, S.; Sikorski, M.; Sokaras, D.; Lemke, H. T.; Canton, S. E.; Wärnmark, K.; Persson, P.; Cordones, A. A. & Gaffney, K. J.
Solvent control of charge transfer excited state relaxation pathways in [Fe(2,2'-bipyridine)(CN)4]2-
Phys. Chem. Chem. Phys. 20 (2018) 4238-4249.

Mátyás Pápai, Mats Simmermacher, Thomas J. Penfold , Klaus B. Møller, Tamás Rozgonyi
How To Excite Nuclear Wavepackets into Electronically Degenerate States in Spin-Vibronic Quantum Dynamics Simulations
J. Chem. Theory Comput. 2018, 14, 8, 3967-3974

Gianluca Levi, Mátyás Pápai, Niels E. Henriksen, Asmus O. Dohn, Klaus B. Møller
Solution Structure and Ultrafast Vibrational Relaxation of the PtPOP Complex Revealed by ΔSCF-QM/MM Direct Dynamics Simulations
J. Phys. Chem. C 2018, 122, 13, 7100-7119

Spencer L. Horton, Yusong Liu, Pratip Chakraborty, Philipp Marquetand, Tamás Rozgonyi, Spiridoula Matsika, and Thomas Weinacht
Strong-field- versus weak-field-ionization pump-probe spectroscopy
Phys. Rev. A 98 (2018) 053416


É. G. Bajnóczi, Z. Németh, G. Vankó
Simultaneous Speciation, Structure, and Equilibrium Constant Determination in the Ni2+ – EDTA – CN Ternary System via High-Resolution Laboratory X-ray Absorption Fine Structure Spectroscopy and Theoretical Calculations
Inorg. Chem. 56 (2017) 14220–14226.

March, A. M.; Assefa, T. A.; Boemer, C.; Bressler, C.; Britz, A.; Diez, M.; Doumy, G.; Galler, A.; Harder, M.; Khakhulin, D.; Németh, Z.; Pápai, M; Schulz, S.; Southworth, S. H.; Yavas, H.; Young, L.; Gawelda, W. & Vankó, G.
Probing Transient Valence Orbital Changes with Picosecond Valence-to-Core X-ray Emission Spectroscopy
J. Phys. Chem. C 121 (2017) 2620–2626.

Z. Németh, J. Szlachetko, É. G. Bajnóczi, G. Vankó
Laboratory von Hámos X-ray Spectroscopy for Routine Sample Characterization
Review of Scientific Instruments 87 (2016) 103105, arXiv:1607.08045

Biasin, E.; van Driel, T. B.; Kjær, K. S.; Dohn, A. O.; Christensen, M.; Harlang, T.; Chabera, P.; Liu, Y.; Uhlig, J.; Pápai, M.; Németh, Z.; Hartsock, R.; Liang, W.; Zhang, J.; Alonso-Mori, R.; Chollet, M.; Glownia, J. M.; Nelson, S.; Sokaras, D.; Assefa, T. A.; Britz, A.; Galler, A.; Gawelda, W.; Bressler, C.; Gaffney, K. J.; Lemke, H. T.; Møller, K. B.; Nielsen, M. M.; Sundström, V.; Vankó, G.; Wärnmark, K.; Canton, S. E. & Haldrup, K.
Femtosecond X-Ray Scattering Study of Ultrafast Photoinduced Structural Dynamics in Solvated [Co(terpy)2]2+
Phys. Rev. Lett. 117 013002 (2016), available also at arxiv.com arXiv:1607.01511

M. Pápai, G. Vankó, T. Rozgonyi, T. Penfold
High Efficiency Iron Photosensitiser Explained with Quantum Wavepacket Dynamics
J. Phys. Chem. Lett. 7 (2016) 2009

T. J. Penfold, M. Pápai, T. Rozgonyi, K. B. Møller, G. Vankó
Probing Spin-Vibronic Dynamics Using Femtosecond X-ray Spectroscopy
Faraday Discussions 194<\B> (2016) 731-746., DOI: 10.1039/C6FD00070C

Haldrup, K.; Gawelda, W.; Abela, R.; Alonso-Mori, R.; Bergmann, U.; Bordage, A.; Cammarata, M.; Canton, S. E.; Dohn, A. O.; van Driel, T. B.; Fritz, D. M.; Galler, A.; Glatzel, P.; Harlang, T.; Kjær, K. S.; Lemke, H. T.; Møller, K. B.; Németh, Z.; Pápai, M.; Sas, N.; Uhlig, J.; Zhu, D.; Vankó, G.; Sundström, V.; Nielsen, M. M., and Bressler, C.
Observing Solvation Dynamics with Simultaneous Femtosecond X-ray Emission Spectroscopy and X-ray Scattering
J. Phys. Chem. B 120 (2016) 1158–1168

S.E. Canton, K.S. Kjær, G. Vankó, T. B. van Driel, S. Adachi, A. Bordage, C. Bressler, P. Chabera, M. Christensen, A.O. Dohn, A. Galler, W. Gawelda, D. Gosztola, K. Haldrup, T. Harlang, Y. Liu, K. B. Møller, Z. Németh, S. Nozawa, M. Pápai, T. Sato, T. Sato, K. Suarez-Alcantara, T. Togashi, K. Tono, J. Uhlig, D. A. Vithanage, K. Wärnmark, M. Yabashi, J. Zhang, V. Sundström and M. M. Nielsen
Visualizing the Nonequilibrium Dynamics of Photoinduced Intramolecular Electron Transfer with Femtosecond X-ray Pulses
Nature Communications 6 (2015) 6359

G. Vankó, A. Bordage, M. Pápai, K. Haldrup, P. Glatzel, A. M. March, G. Doumy, A. Britz, A. Galler, T. Assefa, D. Cabaret, A. Juhin, T. B. van Driel, K. S. Kjær, A. Dohn, K B. Møller, H. T. Lemke, E. Gallo, M. Rovezzi, Z. Németh, E. Rozsályi, T. Rozgonyi, J. Uhlig, V. Sundström, M. M. Nielsen, L. Young, S. H. Southworth, C. Bressler, and W. Gawelda
Detailed Characterization of a Nanosecond-Lived Excited State: X-Ray and Theoretical Investigation of the Quintet State in Photoexcited [Fe(terpy)2]2+
J. Phys. Chem. C 119 (2015) 5888-5902

March, A. M.; Assefa, T. A.; Bressler, C.; Doumy, G.; Galler, A.; Gawelda, W.; Kanter, E. P.; Németh, Z.; Pápai, M.; Southworth, S. H.; Young, L. & Vankó, G.
Feasibility of Valence-to-Core X-ray Emission Spectroscopy for Tracking Transient Species
J. Phys. Chem. C 119 (2015) 14571-14578

Zhang, W.; Alonso-Mori, R.; Bergmann, U.; Bressler, C.; Chollet, M.; Galler, A.; Gawelda, W.; Hadt, R. G.; Hartsock, R. W.; Kroll, T.; Kjaer, K. S.; Kubicek, K.; Lemke, H. T.; Liang, H. W.; Meyer, D. A.; Nielsen, M. M.; Purser, C.; Robinson, J. S.; Solomon, E. I.; Sun, Z.; Sokaras, D.; van Driel, T. B.; Vankó, G.; Weng, T.-C.; Zhu, D. & Gaffney, K. J.
Tracking excited-state charge and spin dynamics in iron coordination complexes
Nature 509 (2014) 345-348

Fredin, L. A.; Pápai, M.; Rozsályi, E.; Vankó, G.; Wärnmark, K.; Sundström, V.; Persson, P.
Exceptional Excited-State Lifetime of an Iron(II)−N‑Heterocyclic Carbene Complex Explained
J. Phys. Chem. Lett. 4 (2014) 2066–2071.

Szilágyi, E.; Kótai, E.; Rata, D.; Németh, Z., Vankó, G.
Channelling study of La1−xSrxCoO3 films on different substrates
NIM B 332 (2014) 393 - 396

C. Bressler, W. Gawelda, A. Galler, M. M. Nielsen, K. Haldrup, V. Sundström, G. Doumy, A. M. March, S. H. Southworth, L. Young, G. Vankó
Ultrafast Electronic and Structural Intramolecular Dynamics and Guest-host interactions observed via simultaneous X-ray spectroscopies and diffuse scattering
Faraday Discussions 171 (2014) 169–178.

Kuzmann, E.; Zoppellaro, G.; Pechousek, J.; Cuda, J.; Klencsár, Z.; Hommonay, Z.; Tucek, J.; Szalay, R.; Pápai, M.; Machala, L.; Zboril, R.
Ferromagnetic Coupling in an Fe[C(SiMe3)3]2/Ferrihydrite Hetero-Mixture Molecular Magnet

M. Pápai, G. Vankó
On Predicting Mössbauer Parameters of Iron-Containing Molecules with Density-Functional Theory
J. Chem. Theory Comput. 9 (2013), pp 5004–5020
(See the highlight by the Mössbauer Effect Data Center )

Pápai M, Vankó G, de Graaf C, Rozgonyi T
Theoretical investigation of the electronic structure of Fe(II) complexes at spin-state transitions

Z. Németh, A. Szabó, K. Knizek, M. Sikora, R. Chernikov, N. Sas, C. Bogdán, D. L. Nagy, G. Vankó
On the microscopic origin of the magneto-electronic phase separation in Sr-doped LaCoO3
Phys. Rev. B 88 (2013) 035125. arxiv preprint

Vankó G, Bordage A, Glatzel P, Gallo E, Rovezzi M, Gawelda W, Galler A, Bressler C, Doumy G, March AM, Kanter EP, Young L, Southworth SH, Canton SE, Uhlig J, Smolentsev G, Sundström V, Haldrup K, van Driel TB, Nielsen MM, Kjaer KS, Lemke HT
Spin-state studies with XES and RIXS: From static to ultrafast
(Invited paper for the special issue: "Progress in RIXS")
Ranked among the top 25 most downloaded articles of the journal as:
6th between January to December, 2013 (full year)
12th between October to December, 2012

A. Bordage, M. Pápai, N. Sas, J. Szlachetko, M. Nachtegaal, G. Vankó
On the sensitivity of hard X-ray spectroscopies to the chemical state of Br
PHYS. CHEM. CHEM. PHYS. 15 (2013) 11088–11098

Canton, S. E.; Zhang, X.; Zhang, J.; van Driel, T. B.; Kjær, K. S.; Haldrup, K.; Chabera, P.; Harlang, T.; Suarez-Alcantara, K.; Liu, Y.; Pérez, J.; Bordage, A.; Pápai, M.; Vankó, G.; Jennings, G.; Kurtz, C. A.; Rovezzi, M.; Glatzel, P.; Smolentsev, G.; Uhlig, J.; Dohn, A. O.; Christensen, M.; Galler, A.; Gawelda, W.; Bressler, C.; Lemke, H. T.; Møller, K. B.; Nielsen, M. M.; Lomoth, R.; Wärnmark, K., Sundström, V.
Toward Highlighting the Ultrafast Electron Transfer Dynamics at the Optically Dark Sites of Photocatalysts
J. PHYS. CHEM. LETTERS 4 (2013) 1972–1976.

R. Kurian, M.M. van Schooneveld, Z. Németh, G. Vankó, F.M.F. de Groot:
Temperature-Dependent 1s2p Resonant Inelastic X-ray Scattering of CoO
J. Phys. Chem. C 117 (2013) 2976 - 2981.

Renz F, Vankó G, Homenya P, Saadat R, Németh Z, Huotari S
Hard-X-ray-induced thermal hysteresis (HAXITH) in a molecular switchable solid

Haldrup K, Vankó G, Gawelda W, Galler A, Doumy G, March AM, Kanter EP, Bordage A, Dohn A, van Driel TB, Kjaer KS, Lemke HT, Canton SE, Uhlig J, Sundstrom V, Young L, Southworth SH, Nielsen MM, Bressler C
Guest-Host Interactions Investigated by Time-Resolved X-ray Spectroscopies and Scattering at MHz Rates: Solvation Dynamics and Photoinduced Spin Transition in Aqueous Fe(bipy)(3)(2+)
(highlighted by APS:)

Deák L, Bottyán L, Fülöp T, Kertész G, Nagy DL, Ruffer R, Spiering H, Tanczikó F, Vankó G
Switching Reciprocity On and Off in a Magneto-Optical X-Ray Scattering Experiment Using Nuclear Resonance of alpha-Fe-57 Foils
PHYSICAL REVIEW LETTERS 109:(23) Paper 237402. 4 p. (2012)
(This work has been highlighted as an ESRF Spotlight )

Loa I, Syassen K, Monaco G, Vankó G, Krisch M, Hanfland M
Plasmons in Sodium under Pressure: Increasing Departure from Nearly Free-Electron Behavior
PHYSICAL REVIEW LETTERS 107:(8) Paper 086402. (2011)

Vankó G, Glatzel P, Pham VT, Abela R, Grolimund D, Borca CN, Johnson SL, Milne CJ, Bressler C
Picosecond Time-Resolved X-Ray Emission Spectroscopy: Ultrafast Spin-State Determination in an Iron Complex

June 2019, MARS, SOLEIL, , France
Feb 2019, SACLA, Japan
Dec 2018, XCS, LCLS, Stanford, USA

Mar 2018, FXE, European XFEL, Hamburg, Germany
Mar 2018, SACLA, Japan
July 2018, ID20, ESRF, Grenoble, France
Oct 2017, ELI Beamlines, Dolní Břežany, Czech Republic
Sep 2017, FXE, European XFEL, Hamburg, Germany

June 2017, SACLA, Japan

Dec 2016, 7-ID, APS, Argonne, USA
Sep 2016, P01, Petra III., Hamburg, Germany
Apr 2016, 7-ID, APS, Argonne, USA
Feb 2016, 7-ID, APS, Argonne, USA
Nov 2015, SACLA, Japan
Oct 2015, SuperXAS, Swiss Light Source
Aug. 2015, XPP, LCLS, Stanford, USA
June 2015, ID09, ESRF, Grenoble, France
May 2015, SACLA, Japan
March 2015, 7-ID, APS, Argonne, USA
Feb. 2015, ID26, ESRF, Grenoble, France
Oct. 2014, SuperXAS, Swiss Light Source
July 2014, 7-ID, APS, Argonne, USA

June 2014, SACLA, Japan

May 2014, ID09, ESRF, Grenoble, France
Feb. 2014, XPP, LCLS, Stanford, USA
Nov 2013, 7-ID, APS, Argonne, USA
May 2013, ID09, ESRF, Grenoble, France
Apr. 2013, BM24, ESRF, Grenoble, France
Jan. 2013, XPP, LCLS, Stanford, USA

In the media/news (Sajtó- és médiamegjelenések)

  • 2017. október 9. MTA WIGNER FK HÍREI: Kipróbáltuk az európai röntgenlézert
  • 2015. március 6. Úttörő lépés a fényhasznosító molekulák működésének megértése felé
  • 2014. május 5. mta.hu: Lendületes kutatók átalakulás közben figyelték meg a molekulákat
  • 2013. szeptember 19. mta.hu: A megkezdett kísérletek folytatását és új, hazai kísérleti bázis építését teszi lehetővé a Lendület
  • 2010. november 12. Interjú Vankó Györggyel, az ERC Starting Grant egyik nyertesével kutatási terveiről és kutatásainak várható hatásairól az Inforádió november 12-i "Géniusz" nevű tudományos magazinjában. 1. rész, 2. rész