K. Ullmann

1.1k citations

21 papers · 682 indexed · 1 hit paper · h-index 11

Impact in

Atomic and Molecular Physics, and Optics top 5%
- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Quantum and electron transport phenomena
- Atomic and Molecular Physics
- Spectroscopy and Quantum Chemical Studies
Structural Biology top 10%

Papers in ⓘ

Atomic and Molecular Physics, and Optics 13
- Atomic and Molecular Physics 6
- Spectroscopy and Quantum Chemical Studies 3
- Laser-Matter Interactions and Applications 3
Statistical and Nonlinear Physics 5
- Quantum chaos and dynamical systems 5

Co-authors: Heiko B. Weber (7 shared papers)Peter Hommelhoff (3 shared papers)Christian Heide (3 shared papers)Takuya Higuchi (3 shared papers)Iberê L. Caldas (4 shared papers)Gilberto Corso (1 shared paper)A. J. Lichtenberg (1 shared paper)H. Schmidt‐Böcking (7 shared papers)
Journals: Chaos Solitons & Fractals (3 papers)Physical Review A (2 papers)Nanoscale (1 paper)ACS Nano (1 paper)Nature (1 paper)
Partner nations: Germany Brazil United States

In The Last Decade

K. Ullmann

21 papers receiving 666 citations

Hit Papers

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Light-field-driven currents in graphene 2017 · 298 citations

Peers

Countries citing papers authored by K. Ullmann

Since Specialization

Citations

This map shows the geographic impact of K. Ullmann's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by K. Ullmann with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites K. Ullmann more than expected).

Fields of papers citing papers by K. Ullmann

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by K. Ullmann. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by K. Ullmann. The network helps show where K. Ullmann may publish in the future.

Co-authors

The 25 scholars most cited alongside K. Ullmann, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with K. Ullmann Line = papers co-authored together K. Ullmann links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 21 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Light-field-driven currents in graphene Nature ·Takuya Higuchi, Christian Heide, K. Ullmann, Heiko B. Weber, Peter Hommelhoff Hit paper breakdown →	2017	298
2	Single-Molecule Junctions with Epitaxial Graphene Nanoelectrodes Nano Letters ·K. Ullmann, Pedro B. Coto, Susanne Leitherer, Agustín Molina‐Ontoria, Nazario Martı́n, Michael Thoss, Heiko B. Weber	2015	71
3	Multi-hit detector system for complete momentum balance in spectroscopy in molecular fragmentation processes Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ·I Ali, R. Dörner, O. Jagutzki, S. Nüttgens, V. Mergel, L. Spielberger, Kh. Khayyat, Thibault Vogt, H. Bräuning, K. Ullmann, R. Moshammer, J. Ullrich, S. Hagmann, K. O. Groeneveld, C. L. Cocke, H. Schmidt‐Böcking	1999	57
4	Energy equipartition starting from high-frequency modes in the Fermi-Pasta-Ulam β oscillator chain Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics ·K. Ullmann, A. J. Lichtenberg, Gilberto Corso	2000	49
5	A symplectic mapping for the ergodic magnetic limiter and its dynamical analysis Chaos Solitons & Fractals ·K. Ullmann, Iberê L. Caldas	2000	39
6	Dynamic mechanisms of He single ionization by fast proton impact Physical Review A ·A. Gensmantel, J. Ullrich, R. Dörner, R. E. Olson, K. Ullmann, E. Forberich, S. Lencinas, H. Schmidt‐Böcking	1992	32
7	Control of chaotic magnetic fields in tokamaks Brazilian Journal of Physics ·Iberê L. Caldas, Ricardo L. Viana, Michelle Silva Araújo, A. Vannucci, E. C. da Silva, K. Ullmann, M. V. A. P. Heller	2002	25
8	Magnetic field line mappings for a tokamak with ergodic limiters Chaos Solitons & Fractals ·Iberê L. Caldas, Jonathan Pereira, K. Ullmann, Ricardo L. Viana	1996	24
9	Robust Graphene Membranes in a Silicon Carbide Frame ACS Nano ·Daniel Waldmann, Benjamin Butz, Sebastian Bauer, Jan M. Englert, Johannes Jobst, K. Ullmann, Felix Fromm, Maximilian Ammon, Michael Enzelberger, Andreas Hirsch, Sabine Maier, Patrik Schmuki, Thomas Seyller, Erdmann Spiecker, Heiko B. Weber	2013	15
10	A large volume 3D imaging gas scintillation counter with CsI-based wire chamber readout Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ·H. Bräuning, A. Breskin, R. Chechik, V. Dangendorf, A. Demian, K. Ullmann, H. Schmidt‐Böcking	1994	13
11	Delta-electron emission in fast heavy ion — atom collisions: observations of new phenomena and breakdown of common scaling laws Zeitschrift für Physik D Atoms Molecules and Clusters ·C. Kelbch, R. Koch, S. Hagmann, K. Ullmann, H. Schmidt‐Böcking, C. O. Reinhold, David Schultz, R. E. Olson, Gerhard Kraft	1992	11
12	Gateless patterning of epitaxial graphene by local intercalation Nanotechnology ·Christian Sorger, Stefan Hertel, Johannes Jobst, Christian Steiner, K Meil, K. Ullmann, A. Albert, Yanxue Wang, M. Krieger, J. Ristein, Sabine Maier, Heiko B. Weber	2014	9
13	Charge transport in C₆₀-based single-molecule junctions with graphene electrodes Nanoscale ·Susanne Leitherer, Pedro B. Coto, K. Ullmann, Heiko B. Weber, Michael Thoss	2017	8
14	Dynamics of ionization processes studied with the COLTRIMS method—new insight into e–e correlation Radiation Physics and Chemistry ·H. Schmidt‐Böcking, V. Mergel, L. Ph. H. Schmidt, R. Dörner, O. Jagutzki, K. Ullmann, Th. Weber, H. J. Lüdde, E. Weigold, A. S. Kheifets	2003	8
15	Multiple ionization collisions dynamics in 10 MeV F⁶⁺on Ne collisions Journal of Physics B Atomic Molecular and Optical Physics ·E. Forberich, R. Dörner, J. Ullrich, R. E. Olson, K. Ullmann, A. Gensmantel, S. Lencinas, O. Jagutzki, H. Schmidt‐Böcking	1991	7
16	Transitions in the parameter space of a periodically forced dissipative system Chaos Solitons & Fractals ·K. Ullmann, Iberê L. Caldas	1996	6
17	Landau-Zener-Stückelberg interferometer on attosecond timescales in graphene Takuya Higuchi, Christian Heide, K. Ullmann, Heiko B. Weber, Peter Hommelhoff	2018	3
18	Lightwave-controlled electron dynamics in graphene SHILAP Revista de lepidopterología ·Christian Heide, Takuya Higuchi, K. Ullmann, Heiko B. Weber, Peter Hommelhoff	2019	3
19	Recoil-ion momentum spectroscopy (RIMS) Radiation effects and defects in solids ·J. Ullrich, R. Dörner, O. Jagutzki, S. Lencinas, A. Gensmantel, E. Forberich, K. Ullmann, R. E. Olson, H. Schmidt‐Böcking	1993	2
20	Influence of the recoil effect in TiK-shell ionization probabilities Physical Review A ·H. Bräuning, K. Ullmann, V. Dangendorf, H. T. Schmidt, D. Trautmann, Th. Kauer	1991	1

About K. Ullmann

K. Ullmann is a scholar working on Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics, Radiation, Electrical and Electronic Engineering and Nuclear and High Energy Physics, having authored 21 papers that have together received 682 indexed citations. Recurring topics across this work include Atomic and Molecular Physics (6 papers), Quantum chaos and dynamical systems (5 papers), Graphene research and applications (4 papers), X-ray Spectroscopy and Fluorescence Analysis (3 papers), Ion-surface interactions and analysis (3 papers), Spectroscopy and Quantum Chemical Studies (3 papers), Magnetic confinement fusion research (3 papers) and Laser-Matter Interactions and Applications (3 papers). The work is most often cited by research in Atomic and Molecular Physics, and Optics (452 citations), Structural Biology (19 citations), Statistical and Nonlinear Physics (139 citations), Nuclear and High Energy Physics (103 citations) and Radiation (60 citations). K. Ullmann has collaborated with scholars based in Germany, Brazil and United States. Frequent co-authors include Heiko B. Weber, Peter Hommelhoff, Christian Heide, Takuya Higuchi, Iberê L. Caldas, Gilberto Corso, A. J. Lichtenberg, H. Schmidt‐Böcking, Michael Thoss and Pedro B. Coto. Their work appears in journals such as Chaos Solitons & Fractals, Physical Review A, Nanoscale, ACS Nano and Nature.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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