F
Felix Lehmkühler
Researcher at University of Hamburg
Publications - 67
Citations - 1398
Felix Lehmkühler is an academic researcher from University of Hamburg. The author has contributed to research in topics: Scattering & Nanoparticle. The author has an hindex of 20, co-authored 61 publications receiving 1097 citations. Previous affiliations of Felix Lehmkühler include Technical University of Dortmund & SLAC National Accelerator Laboratory.
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Journal ArticleDOI
Diffusive dynamics during the high-to-low density transition in amorphous ice
Fivos Perakis,Katrin Amann-Winkel,Felix Lehmkühler,Michael Sprung,Daniel Mariedahl,Jonas A. Sellberg,Harshad Pathak,Alexander Späh,Filippo Cavalca,Daniel Schlesinger,Alessandro Ricci,Avni Jain,Bernhard Massani,Flora Aubree,Chris J. Benmore,Thomas Loerting,Gerhard Grübel,Lars G. M. Pettersson,Anders Nilsson +18 more
TL;DR: The diffusive character of both the high- and low-density forms is discussed among different interpretations and the results are most consistent with the hypothesis of a liquid–liquid transition in the ultraviscous regime.
Journal ArticleDOI
Single Shot Spatial and Temporal Coherence Properties of the SLAC Linac Coherent Light Source in the Hard X-Ray Regime
Christian Gutt,Peter Wochner,Birgit Fischer,H. Conrad,M. Castro-Colin,Sooheyong Lee,Sooheyong Lee,Felix Lehmkühler,I. Steinke,M. Sprung,W. Roseker,Diling Zhu,Henrik T. Lemke,Stephanie N. Bogle,P. H. Fuoss,G. B. Stephenson,Marco Cammarata,David Fritz,Aymeric Robert,G. Grübel +19 more
TL;DR: The transverse and longitudinal coherence properties of the Linac Coherent Light Source (LCLS) at SLAC is measured in the hard x-ray regime at 9 keV photon energy on a single shot basis.
Journal ArticleDOI
The Carbon Dioxide-Water Interface at Conditions of Gas Hydrate Formation
Felix Lehmkühler,Michael Paulus,Christian Sternemann,Daniela Lietz,Federica Venturini,Christian Gutt,Metin Tolan +6 more
TL;DR: The structure of the carbon dioxide-water interface was analyzed by X-ray diffraction and reflectivity at temperature and pressure conditions which allow the formation of gas hydrate to point to a gas Hydrate formation process which may be explained by the so-called local structuring hypothesis.
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Coherent X-rays reveal the influence of cage effects on ultrafast water dynamics
Fivos Perakis,Fivos Perakis,Gaia Camisasca,Thomas J. Lane,Alexander Späh,Kjartan Thor Wikfeldt,Jonas A. Sellberg,Felix Lehmkühler,Harshad Pathak,Kyung Hwan Kim,Katrin Amann-Winkel,Simon Schreck,Sanghoon Song,Takahiro Sato,Marcin Sikorski,Marcin Sikorski,André Eilert,Trevor A. McQueen,Hirohito Ogasawara,Dennis Nordlund,Wojciech Roseker,Jake Koralek,Silke Nelson,Philip Hart,Roberto Alonso-Mori,Yiping Feng,Diling Zhu,Aymeric Robert,Gerhard Grübel,Lars G. M. Pettersson,Anders Nilsson +30 more
TL;DR: Water dynamics at sub-100 fs is measured and it is shown that it cannot be described by simple thermal motion due to the build-up of tetrahedral structures upon supercooling, and cage effects play an important role even on timescales over 25 fs due to hydrogen-bonding.
Journal ArticleDOI
Towards ultrafast dynamics with split-pulse X-ray photon correlation spectroscopy at free electron laser sources.
W. Roseker,Stephan O. Hruszkewycz,Felix Lehmkühler,Michael Walther,Horst Schulte-Schrepping,Sooheyong Lee,Taito Osaka,Lothar Strüder,Raimo Hartmann,Marcin Sikorski,Sanghoon Song,Aymeric Robert,Paul H. Fuoss,Paul H. Fuoss,Mark Sutton,G. B. Stephenson,Gerhard Grübel +16 more
TL;DR: A state-of-the-art perfect crystal based split-and-delay system, capable of splitting individual X-ray pulses and introducing femtosecond to nanosecond time delays is demonstrated, enabling the characterization of equilibrium and, importantly also reversible non-equilibrium processes in atomically disordered materials.