2.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Max Planck SocietyDE178 papers
- Freie Universität BerlinDE80 papers
- Centre National de la Recherche ScientifiqueFR67 papers
- University of the Basque CountryES53 papers
- Technische Universität BerlinDE51 papers
- Goethe University FrankfurtDE42 papers
- Deutsches Elektronen-Synchrotron DESYDE39 papers
- Humboldt-Universität zu BerlinDE37 papers
- Material Physics CenterES36 papers
- Max Planck Institute for the Structure and Dynamics of MatterDE35 papers
- Technical University of MunichDE31 papers
- Lawrence Berkeley National LaboratoryUS30 papers
37 papers · 1 filter
Real-time probing electron dynamics of an atom in a strong infrared laser field
Yunpei Deng, Xinhua Xie
We present theoretical studies on real-time probing the electron density evolution of an atom in a strong infrared (IR) laser field with few-cycle near-infrared (NIR) and attosecon…
Optimized Effective Potential for Quantum Electrodynamical Time-Dependent Density Functional Theory
Camilla Pellegrini, Johannes Flick, Ilya V. Tokatly +2
We propose a practical approximation to the exchange-correlation functional of (time-dependent) density functional theory for many-electron systems coupled to photons. The (time no…
Static correlation and electron localization in molecular dimers from the self-consistent RPA and GW approximation
Maria Hellgren, Fabio Caruso, Daniel R. Rohr +4
We investigate static correlation and delocalization errors in the self-consistent GW and random-phase approximation (RPA) by studying molecular dissociation of the H_2 and LiH mol…
Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit
Lutz Waldecker, Roman Bertoni, Ralph Ernstorfer
We present the design and implementation of a highly compact femtosecond electron diffractometer working at electron energies up to 100 keV. We use a multi-body particle tracing co…
Time-Domain Separation of Optical Properties From Structural Transitions in Resonantly Bonded Materials
Lutz Waldecker, Timothy A. Miller, Miquel Rude +6
The extreme electro-optical contrast between crystalline and amorphous states in phase change materials is routinely exploited in optical data storage and future applications inclu…
Localization-dependent charge separation efficiency at an organic/inorganic hybrid interface
Laura Foglia, Lea Bogner, Martin Wolf +1
By combining complementary optical techniques, photoluminescence and time-resolved excited state absorption, we achieve a comprehensive picture of the relaxation processes in the o…
Approaching ideal graphene: The structure of hydrogen-intercalated graphene on 6H-SiC(0001)
J. Sforzini, L. Nemec, T. Denig +9
We measure the adsorption height of hydrogen-intercalated quasi-free-standing monolayer graphene on the (0001) face of 6H silicon carbide by the normal incidence x-ray standing wav…
Graphene-Passivated Nickel as an Oxidation-Resistant Electrode for Spintronics
Bruno Dlubak, Marie-Blandine Martin, Robert S. Weatherup +9
We report on graphene-passivated ferromagnetic electrodes (GPFE) for spin devices. GPFE are shown to act as spin-polarized oxidation-resistant electrodes. The direct coating of nic…
A multi-scale approach to the electronic structure of doped semiconductor surfaces
Ofer Sinai, Oliver T. Hofmann, Patrick Rinke +3
The inclusion of the global effects of semiconductor doping poses a unique challenge for first-principles simulations, because the typically low concentration of dopants renders an…
Big Data of Materials Science - Critical Role of the Descriptor
Luca M. Ghiringhelli, Jan Vybiral, Sergey V. Levchenko +2
Statistical learning of materials properties or functions so far starts with a largely silent, non-challenged step: the choice of the set of descriptive parameters (termed descript…
Low-temperature spectroscopy of the CH () band in a helium buffer gas
L. Santamaria, V. Di Sarno, I. Ricciardi +5
Buffer gas cooling with a He gas is used to perform laser-absorption spectroscopy of the CH () band at cryogenic temperatures. Doppler thermometry is fi…
Ultrafast exciton formation at the ZnO(100) surface
J. -C. Deinert, D. Wegkamp, M. Meyer +3
We study the ultrafast quasiparticle dynamics in and below the ZnO conduction band using femtosecond time-resolved two-photon photoelectron spectroscopy. Above band gap excitation…
Efficient ab initio schemes for finding thermodynamically stable and metastable atomic structures: Benchmark of cascade genetic algorithms
Saswata Bhattacharya, Sergey V. Levchenko, Luca M. Ghiringhelli +1
A first-principles based methodology for efficiently and accurately finding thermodynamically stable and metastable atomic structures is introduced and benchmarked. The approach is…
Tunable sub-20 fs pulses from a 500 kHz OPCPA with 15 W average power based on an all-ytterbium laser
Michele Puppin, Yunpei Deng, Oliver Prochnow +6
An optical parametric chirped pulse amplifier fully based on Yb lasers at 500 kHz is described. Passive optical-synchronization is achieved between a fiber laser-pumped white-light…
First-Principles Description of Charge Transfer in Donor-Acceptor Compounds from Self-Consistent Many-Body Perturbation Theory
Fabio Caruso, Viktor Atalla, Xinguo Ren +3
We investigate charge transfer in prototypical molecular donor-acceptor compounds using hybrid density functional theory (DFT) and the GW approximation at the perturbative level (G…
Instantaneous band gap collapse in photoexcited monoclinic VO due to photocarrier doping
Daniel Wegkamp, Marc Herzog, Lede Xian +8
Using femtosecond time-resolved photoelectron spectroscopy we demonstrate that photoexcitation transforms monoclinic VO quasi-instantaneously into a metal. Thereby, we exclude…
Imaging Molecular Structure through Femtosecond Photoelectron Diffraction on Aligned and Oriented Gas-Phase Molecules
R. Boll, A. Rouzee, M. Adolph +49
This paper gives an account of our progress towards performing femtosecond time-resolved photoelectron diffraction on gas-phase molecules in a pump-probe setup combining optical la…
Inelastic X-ray scattering from valence electrons near absorption edges of FeTe and TiSe
B. Barbiellini, J. N. Hancock, C. Monney +4
We study resonant inelastic x-ray scattering (RIXS) peaks corresponding to low energy particle-hole excited states of metallic FeTe and semi-metallic TiSe for photon incident e…
Ultrafast dynamics of fluctuations in high-temperature superconductors far from equilibrium
L. Perfetti, B. Sciolla, G. Biroli +4
Despite extensive work on high-temperature superconductors, the critical behavior of an incipient condensate has so far been studied exclusively under equilibrium conditions. Here,…
Autonomous Learning by Simple Dynamical Systems with Delayed Feedbacks
Pablo Kaluza, Alexander S. Mikhailov
A general scheme for construction of dynamical systems able to learn generation of the desired kinds of dynamics through adjustment of their internal structure is proposed. The sch…
Measuring and manipulating the temperature of cold molecules trapped on a chip
Silvio Marx, David Adu Smith, Boris G. Sartakov +2
We demonstrate the measurement and manipulation of the temperature of cold CO molecules in a microchip environment. Through the use of time-resolved spatial imaging, we are able to…
Germanene: a novel two-dimensional Germanium allotrope akin to Graphene and Silicene
M. E. Dávila, L. Xian, S. Cahangirov +2
Using a gold (111) surface as a substrate we have grown in situ by molecular beam epitaxy an atom-thin, ordered, two-dimensional multi-phase film. Its growth bears strong similarit…
Understanding the origin of band gap formation in graphene on metals: graphene on Cu/Ir(111)
H. Vita, S. Boettcher, K. Horn +5
Understanding the nature of the interaction at the graphene/metal interfaces is the basis for graphene-based electron- and spin-transport devices. Here we investigate the hybridiza…
Protection of excited spin states by a superconducting energy gap
B. W. Heinrich, L. Braun, J. I. Pascual +1
The latest concepts for quantum computing and data storage envision to address and manipulate single spins. A limitation for single atoms or molecules in contact to a metal surface…