52 citations · 208 across the 11 of their papers we have counts for
11 papers
Electronic mechanism of sub-100-fs demagnetization induced by a femtosecond light pulse
Konrad J. Kapcia, Victor Tkachenko, Flavio Capotondi +4
A quantitative understanding of the processes that trigger light-induced demagnetization on ultrashort timescales is crucial for achieving an ultrafast, radiation-controlled magnet…
Exploring x-ray irradiation conditions for triggering ultrafast diamond graphitization
Vladimir Lipp, Victor Tkachenko, Ichiro Inoue +4
Intense femtosecond x-ray pulses produced by an x-ray free-electron laser can trigger irreversible structural transitions in crystalline solids. For instance, irradiation of diamon…
Interplay of thermal and non-thermal effects in x-ray-induced ultrafast melting
Ichiro Inoue, Victor Tkachenko, Yuya Kubota +15
X-ray laser-induced structural changes in silicon undergoing femtosecond melting have been investigated by using an x-ray pump-x-ray probe technique. The experimental results for d…
Ultrafast demagnetization in bulk nickel induced by X-ray photons tuned to Ni and absorption edges
Konrad J. Kapcia, Victor Tkachenko, Flavio Capotondi +4
Studies of light-induced demagnetization started with the experiment performed by Beaupaire et al. on nickel. Here, we present theoretical predictions for X-ray induced demagnetiza…
Femtosecond reduction of atomic scattering factors triggered by intense x-ray pulse
Ichiro Inoue, Jumpei Yamada, Konrad J. Kapcia +12
X-ray diffraction of silicon irradiated with tightly focused femtosecond x-ray pulses (photon energy: 11.5 keV, pulse duration: 6 fs) was measured at various x-ray intensities up t…
Electronic processes occurring during ultrafast demagnetization of cobalt triggered by X-ray photons tuned to Co L resonance
Konrad J. Kapcia, Victor Tkachenko, Flavio Capotondi +6
Magnetization dynamics triggered with ultrashort laser pulses has been attracting significant attention, with strong focus on the dynamics excited by VIS/NIR pulses. Only recently,…
Modeling of ultrafast X-ray induced magnetization dynamics in magnetic multilayer systems
K. J. Kapcia, V. Tkachenko, F. Capotondi +6
In this work, we report on modelling results obtained with our recently developed simulation tool enabling nanoscopic description of electronic processes in X-ray irradiated ferrom…
Delayed onset and directionality of x-ray-induced atomic displacements observed on subatomic length scales
Ichiro Inoue, Victor Tkachenko, Konrad J. Kapcia +6
Transient structural changes of AlO on subatomic length scales following irradiation with an intense x-ray laser pulse (photon energy: 8.70 keV; pulse duration: 6 fs; fluen…
Electron-ion coupling in semiconductors beyond Fermi's golden rule
Nikita Medvedev, Zheng Li, Victor Tkachenko +1
In the present work, a theoretical study of electron-phonon (electron-ion) coupling rates in semiconductors driven out of equilibrium is performed. Transient change of optical coef…
Soft x-rays induce femtosecond solid-to-solid phase transition
Franz Tavella, Hauke Höppner, Victor Tkachenko +12
Soft x-rays were applied to induce graphitization of diamond through a non-thermal solid-to-solid phase transition. This process was observed within poly-crystalline diamond with a…
Time-resolved observation of band-gap shrinking and electron-lattice thermalization within X-ray excited gallium arsenide
Beata Ziaja, Nikita Medvedev, Victor Tkachenko +2
Femtosecond X-ray irradiation of solids excites energetic photoelectrons that thermalize on a timescale of a few hundred femtoseconds. The thermalized electrons exchange energy wit…