Humboldt-Universität zu Berlin - Faculty of Mathematics and Natural Sciences - electron dynamiX group


(The group's thesis work can be found here.)



L.Gierster, O. Turkina, J.-C. Deinert, E. Bowen Dodoo, Y. Garmshausen, S. Hecht, C. Draxl, J. Stähler

How hybrid excitons suppress charge separation: ultrafast, but delayed

submitted, arxiv:2307.05257


B. Tanda Bonkano, S. Palato, J. Krumland, S. Kovalenko, P. Schwendke, M. Guerrini, Q. Li, X.-Y. Zhu, C. Cocchi, J. Stähler

Evidence for hybrid inorganic-organic transitions at the WS2/terrylene interface

Phys. Status Solidi A, DOI:10.1002/pssa.202300346


A. Demling, S. B. King, J. Stähler

O2 reduction at a DMSO/Cu(111) model battery interface

J. Phys. Chem. C DOI:10.1021/acs.jpcc.2c07491  (open access) (2023) arXiv.2210.13528v2


S. Calati, Q. Li, X.-Y. Zhu, J. Stähler

Dynamic screening of quasiparticles in WS2 monolayers

Phys. Rev. B 107115404, DOI:10.1103/PhysRevB.107.115404 (2023), arXiv.2204.02125


P. Brosseau, H. Seiler, S. Palato, C. Sonnichsen, H. Baker, E. Socie, D. Strandell, P. Kambhampati

Perturbed free induction decay obscures early time dynamics in two-dimensional electronic spectroscopy: the case of semiconductor nanocrystals

J. Chem. Phys.  DOI:10.1063/5.0138252 (2023)



A. Dubey, C. H. Keat, V. V. Shvartsman, K. V. Yusenko, M. C. Escobar, A. G. Buzanich, U. Hagemann, S. A. Kovalenko, J. Stähler, D. C. Lupascu

Mono-, Di-, and Tri-valent Cation Doped BiFe0.95Mn0.05O3 Nanoparticles: Ferroelectric Photocatalysts

Adv. Funt. Mat. 2207105 (2022), DOI:10.1002/adfm.202207105


S. Mor, M. Herzog, C. Monney, J. Stähler

Ultrafast charge carrier and exciton dynamics in an excitonic insulator probed by time-resolved photoelectron spectroscopy

Prog. Surf. Sci. (2022) DOI:10.1016/j.progsurf.2022.100679, or on arXiv.2208.14574 (open access)


L. Gierster, S. Vempati, J. Stähler

Ultrashort and metastable doping of the ZnO surface by photoexcited defects

Faraday Disc. (2022) DOI:10.1039/D2FD00036A (open access)


S. Palato, P. Schwendke, N. Große, J. Stähler

Pseudoheterodyne near-field imaging at kHz repetition rates via quadrature-assisted discrete demodulation

Appl. Phys. Lett. 120 131601 (2022), DOI: 10.1063/5.0087187 (APL Special Topic: Optical Nanoprobe Spectroscopy and Imaging)


A. L. Dobryakov, O.A. Krohn, M. Quick, I. N. Ioffe, S. A. Kovalenko

Positive and negative signal and line shape in stimulated Raman spectroscopy: Resonance femtosecond Raman spectra of diphenylbutadiene

J. Chem. Phys. 156 084304 (2022), DOI: 10.1039/d1cp03560f



S. Calati, Q. Li, X.-Y. Zhu, J. Stähler

Ultrafast evolution of the complex dielectric function of monolayer WS2 after photoexcitation

Phys. Chem. Chem. Phys. 23 22640 (2021), DOI: 10.1039/d1cp03437e (open access)

***PCCP themed collection: Ultrafast Spectroscopy: Theory and Experiments***


S. M. Sudarkova, V. E. Khinevich, I. N. Ioffe, M. Quick, S. A. Kovalenko

Substitution pattern dependent behavior of the singlet excited states in symmetrically fluorinated biphenyls

Phys. Chem. Chem. Phys. 23 22067 (2021), DOI: 10.1039/d1cp03560f


G.A. Farrow, M. Quick, S.A. Kovalenko, G. Wu, A. Sadler, D. Chekulaev, A.A.P. Chauvet, J.A. Weinstein and N.P. Ernsting

On the intersystem crossing rate in a Platinum(II) donor–bridge–acceptor triad

Phys. Chem. Chem. Phys. 23 21652 (2021), DOI: 10.1039/d1cp03471e


L. Gierster, S. Vempati, J. Stähler

Ultrafast generation and decay of a surface metal

Nat. Commun. 12 978 (2021) (open access publisher version)

***explainer video on YouTube***


A. Demeter and S. A.  Kovalenko

Photoinduced intramolecular charge transfer and relaxation dynamics of 4-dimethylaminopyridine in water, alcohols, and aprotic solvents

J. Photochem. Photobio. A 412, 113246 (2021) (publisher version)


S. Park, N. Mutz, S. A. Kovalenko, T. Schultz, D. Shin, X. Xu, A. Aljarb, A. Han, L.-J. Li, V.C. Tung, P. Amsalem, E. J. W. List-Kratochvil, J. Stähler, S. Blumstengel, N. Koch

Type-I energy level alignment at the PTCDA - monolayer MoS2 interface promotes resonance energy transfer and luminescence enhancement

Adv. Sci. 2100215 (2021) (open access publisher version)



M.T. Quick, M. Quick, I.N. Ioffe, C. Richter, R. Mahrwald, S. Druzhinin, S.A. Kovalenko

Transient Rotamerism and Photoisomerization Dynamics of trans- and cis-Naphthylstilbene

J. Phys. Chem. B 124 (6), 1049 (2020) (publisher version)


T. Janz, M. Güterbock, F. Müller, M. Quick, I.N. Ioffe, F.A. Bischoff, S.A. Kovalenko

Evaluating the solvent stark effect from temperature‐dependent solvatochromic shifts of anthracene

Chem. Phys. Chem. 21, 610 (2020) (publisher version)


Y. Wang, X.H. Liu, Q. Wang, M. Quick, S.A. Kovalenko, Q.Y. Chen, N. Koch, N. Pinna

Insights into charge transfer at an atomically precise nanocluster/semiconductor interface

Angewandte Chemie 132 (20), 7822 (2020) (publisher version)


O. A. Krohn, M. Quick, S. M. Sudarkova, I. N. Ioffe, C. Richter, S. A. Kovalenko

Photoisomerization Dynamics of trans-trans, cis-trans and cis-cis Diphenylbutadiene from Broadband Transient Absorption Spectroscopy and Calculations

J. Chem. Phys. 152, 224305 (2020) (publisher version)


S. PalatoH. Seiler, H. Baker, C. Sonnichsen, P. Brosseau, P. Kambhampati

Investigating the electronic structure of confined multiexcitons with nonlinear spectroscopies

J. Chem. Phys. 152, 104710 (2020)


Cord Bertram, Philipp Auburger, Michel Bockstedte, Julia Stähler, Uwe Bovensiepen, Karina Morgenstern

Impact of electron solvation on ice structures at the molecular scale

J. Phys. Chem. Lett. 11, 4, 1310 (2020) (publisher version) (preprint: arXiv:1909.03844)


Sesha Vempati, Lea Bogner, Clemens Richter, Jan-Christoph Deinert, Laura Foglia, Lukas Gierster, Julia Stähler

Photoexcited organic molecules en route to highly efficient autoionization

J. Chem. Phys. 152, 074715 (2020), (publisher version, OPEN ACCESS) (preprint: arXiv:1911.04333)

***JCP Special Topic: Ultrafast Molecular Sciences by Femtosecond Photons and Electrons***



Sarah B. King, Katharina Broch, Angelika Demling, Julia Stähler

Multistep and multiscale electron transfer and localization dynamics at a model electrolyte/metal interface

J. Chem. Phys. 150, 041702 (2019) (publisher version)

***JCP Special Topic: Interfacial Electrochemistry and Photo(electro)catalysis***


Sesha Vempati, Jan-Christoph Deinert, Lukas Gierster, Lea Bogner, Clemens Richter, Niklas Mutz, Sylke Blumstengel, Anton Zykov, Stefan Kowarik, Yves Garmshausen, Jana Hildebrandt, Stefan Hecht, Julia Stähler ­­

Uncovering the (un-)occupied electronic structure of a buried hybrid interface by selective interfacial photoexcitation

J. Phys.: Cond. Matt. 31, 094001 (2019), (publisher version, OPEN ACCESS) (preprint: arXiv:1811.00779)

***JPCM Special Issue: Internal Interfaces***


Laura Foglia, Sesha Kumar Vempati, Boubacar Tanda Bonkano, Lukas Gierster, Martin Wolf, Sergey Sadofev, Julia Stähler

Revealing the Competing Contributions of Charge Carriers, Excitons, and Defects to the Non-Equilibrium Optical Properties of ZnO

Struct. Dyn. 6, 034501 (2019) (publisher version) (preprint: arXiv:1811.04499)

***One of the top cited Struct. Dyn. articles in 2019***



Selene Mor, Marc Herzog, Johannes Noack, Naoyuki Katayama, Minoru Nohara, Hide Takagi, Annette Trunschke, Takashi Mizokawa, Claude Monney, Julia Stähler

Inhibition of the photoinduced structural phase transition in the excitonic insulator Ta2NiSe5

Phys. Rev. B 97 115154 (2018) (publisher version) (preprint: arXiv:1804.00882)



Selene Mor, Marc Herzog, Denis Golez, Philipp Werner, Martin Eckstein, Naoyuki Katayama, Minoru Nohara, Hide Takagi, Takashi Mizokawa, Claude Monney, Julia Stähler

Ultrafast electronic band gap control in an excitonic insulator

Phys. Rev. Lett. 119 086401 (2017) (publisher version)


Sarah B. King, D. Wegkamp, Clemens Richter, Julia Stähler

Trapped Electrons at the Amorphous Solid Water/Vacuum Interface as Possible Reactants in a Water Splitting Reaction

J. Phys. Chem. C 121 7379 (2017) (publisher version)


Julia Stähler and Patrick Rinke

Global and local aspects of the surface potential landscape for energy level alignment at organic-ZnO interfaces

Chemical Physics 485 149 (2017) (publisher version)



Laura Foglia, Lea Bogner, Martin Wolf and Julia Stähler

Localization-dependent charge separation efficiency at an organic/inorganic hybrid interface

Chem. Phys. Lett. 646 25 (2016) (publisher version) (free full text)

***Frontiers Article***


Laura Foglia, Martin Wolf, Julia Stähler

Ultrafast dynamics in solids probed by femtosecond time-resolved broadband electronic sum frequency generation

Appl. Phys. Lett. 109 202106 (2016) (publisher version)


Jan-Christoph Deinert, Oliver Hofmann, Michael Meyer, Patrick Rinke, Julia Stähler

Local aspects of hydrogen-induced metallization of the ZnO(10-10) surface

Phys. Rev. B 91 235313 (2015) (publisher version) (free full text)


Daniel Wegkamp and Julia Stähler

Ultrafast dynamics during the photoinduced phase transition in VO2

Progress in Surface Science 90 464 (2015) (publisher version) (free full text)


Julia Stähler, Jan-Christoph Deinert, Daniel Wegkamp, Sebastian Hagen, and Martin Wolf

Real time measurement of the vertical binding energy during the birth of a solvated electron

J. Am. Chem. Soc. 137 3520 (2015) (publisher version) (free full text)



D. Wegkamp, M. Herzog, L. Xian, M. Gatti, P. Cudazzo, C. L. McGahan, R. E. Marvel, R. F. Haglund, A. Rubio, M. Wolf, J. Stähler

Instantaneous band gap collapse in photoexcited monoclinic VO2 due to photocarrier doping

Phys. Rev. Lett. 113 216401 (2014) (publisher version) (free full text)


Jan-Christoph Deinert, Daniel Wegkamp, Michael Meyer, Clemens Richter, Martin Wolf, and Julia Stähler

Ultrafast exciton formation at the ZnO(10-10) surface

Phys. Rev. Lett. 113 057602 (2014) (publisher version) (free full text)


M. Mitrano, G. Cotugno, S.R. Clark, R. Singla, S. Kaiser et al.

Pressure dependent relaxation in the photo-excited Mott insulator ET-F2TCNQ: influence of hopping and correlations

Phys. Rev. Lett. 112 117801 (2014) (publisher version) (free full text)



D. Wegkamp, M. Meyer, C. Richter, M. Wolf, and J. Stähler

Photoinduced work function modifications and their effect on photoelectron spectroscopy

Appl. Phys. Lett. 103 151603 (2013) (publisher version) (free full text)


O. T. Hofmann, J.-C. Deinert, Y. Xu, P. Rinke, J. Stähler, M. Wolf, and M. Scheffler

Large work function reduction by adsorption of a molecule with a negative electron affinity: Pyridine on ZnO(10-10)

J. Chem. Phys., 139 174701 (2013) (publisher version) (free full text)

***Top 25 of the most viewed JCP articles in 2014!***


J. Stähler, O. T. Hofmann, P. Rinke, S. Blumstengel, F. Henneberger, Y. Li, T. F. Heinz

Raman study of 2,7-bis(biphenyl-4-yl-)2',7'-ditertbutyl-9,9'-spirobifluorene adsorbed on oxide surfaces

Chem. Phys. Lett. 584 74 (2013) (publisher version) (free full text)


S. Wall, L. Foglia, D. Wegkamp, K. Appavoo, J. Nag, R. F. Haglund, J. Stähler, M. Wolf

Tracking the evolution of the electronic and structural properties of VO2 during the ultrafast photoinduced insulator-metal transition

Phys. Rev. B 87 115126 (2013) (publisher version) (free full text)



S. Wall, D. Wegkamp, L. Foglia, K. Appavoo, J. Nag, R. F. Haglund, J. Stähler, M. Wolf

Ultrafast changes in lattice symmetry probed by coherent phonons

Nat. Commun., 3, 721 (2012), (publisher version) (free full text)


J. Stähler, C. Gahl, M. Wolf

Dynamics and reactivity of trapped electrons on supported ice crystallites Acc. Chem. Res., 45, 1, 131 (2012) (publisher version) (free full text)


D. Sánchez-Portal, J. Stähler, X.-Y. Zhu

Basic theory of heterogeneous electron transfer

in: Dynamics at Solid State Surfaces and Interfaces, Part II: Fundamentals U. Bovensiepen, H. Petek, M. Wolf (Ed.) , Wiley-VCH, Berlin (2012) ISBN: 978-3-527-40924-2



D. Wegkamp, D. Brida, S. Bonora, G. Cerullo, J. Stähler, M. Wolf and S. Wall.

Phase retrieval and compression of low-power white-light pulses

Appl. Phys. Lett. 99, 101101 (2011) (publisher version) (free full text)


A. J. Stähler

Unsterbliche Elektronen

in: Aus den Elfenbeintürmen der Wissenschaft Bd.5, E.-M. Neher (Ed.), Wallstein-Verlag, Göttingen (2011) ISBN 978-3-8353-1027-8, S. 39-46.


J. Stähler, M. Meyer, U. Bovensiepen, M. Wolf.

Solvation dynamics of surface-trapped electrons at NH3 and D2O crystallites adsorbed on metals: From femtosecond to minute timescales

Chem. Sci. 2 (5), 907 (2011) (publisher version) (free full text)



J. Stähler, U. Bovensiepen, M. Wolf

Electron dynamics at polar molecule – metal interfaces: Competition between localization, solvation, and transfer

in: Dynamics at Solid State Surfaces and Interfaces, Part I: Current Developements U. Bovensiepen, H. Petek, M. Wolf (Ed.) , Wiley-VCH, Berlin (2010) ISBN: 978-3-527-40937-2



U. Bovensiepen, C. Gahl, J. Stähler, M. Bockstedte, M. Meyer, F. Baletto, S. Scandolo, X.-Y. Zhu, A. Rubio, M. Wolf

A dynamic landscape from femtoseconds to minutes for excess electrons at ice-metal interfaces

J. Phys. Chem. C 113 (3), 979 (2009) (publisher version)


M. Bertin, M. Meyer, J. Stähler, C. Gahl, M. Wolf, U. Bovensiepen.

Reactivity of water-electron complexes on crystalline ice surfaces

Faraday Discussion 141, 293 (2009) (publisher version)



J. Stähler, M. Meyer, D. O. Kusmierek, U. Bovensiepen, M. Wolf

Ultrafast electron transfer dynamics at NH3/Cu(111) interfaces: Determination of the transient tunneling barrier

J. Am. Chem. Soc. 130, 27, 8797 (2008) (publisher version)


J. Stähler, U. Bovensiepen, M. Meyer, M. Wolf

A surface science approach to electron transfer and solvation dynamics at interfaces

Chem. Soc. Rev. 37 10, 2180 (2008) (publisher version)


M. Meyer, J. Stähler, D. O. Kusmierek, M. Wolf, U. Bovensiepen

Determination of the electron's solvation site on D2O/Cu(111) using Xe overlayers and femtosecond photoelectron spectroscopy Phys. Chem. Chem. Phys. 10, 4932 (2008) (publisher version)



Unsterbliche Elektronen

Sonderheft im Bild der Wissenschaft, Nov. Edition 2008,



J. Stähler, M. Mehlhorn, U. Bovensiepen, M. Meyer, D. O. Kusmierek, K. Morgenstern, M. Wolf

Impact of ice structure on ultrafast electron dynamics in D2O clusters on Cu(111)

Phys. Rev. Lett. 98, 206105, 1-4 (2007) (publisher version)


J. Stähler, M. Meyer, U. Bovensiepen, X.-Y. Zhu, M. Wolf

Dynamics of electron transfer at polar molecule-metal interfaces: The role of thermally activated tunnelling

New J. Phys. 394 1-13 (2007) (publisher version)



J. Stähler, U. Bovensiepen, C. Gahl, M. Wolf

Ultrafast electron dynamics at ice/metal interfaces: Competition between heterogeneous electron transfer and solvation

J. Phys. Chem. B 110, 9637-9644 (2006) (publisher version)



U. Bovensiepen, C. Gahl, J. Stähler, P.A. Loukakos, M. Wolf

Femtosecond dynamics of electron transfer, localization and solvation processes at the ice-metal interface0

Isr. J. Chem. 45, 171-180 (2005) (publisher version)


U. Bovensiepen, C. Gahl, J. Stähler and M. Wolf

Ultrafast electron dynamics in amorphous and crystalline D2O layers on Ru(001)

Surf. Sci. 584, 90-97 (2005) (publisher version)



M. Lisowski, P. A. Loukakos, U. Bovensiepen, J. Stähler, C. Gahl, M. Wolf

Ultrafast dynamics of electron thermalization, cooling and transport effects in Ru(001)

App. Phys. A 78, 165-176 (2004) (publisher version)