108 citations · 277 across the 9 of their papers we have counts for
9 papers
Identification of the decay pathway of photoexcited nucleobases
Xiangxu Mu, Ming Zhang, Jiechao Feng +6
The identification of the decay pathway of the nucleobase uracil after being photoexcited by ultraviolet (UV) light has been a long standing problem. Various theoretical models hav…
Contribution of inter- and intraband transitions into electron-phonon coupling in metals
Nikita Medvedev, Igor Milov
We recently developed an approach for calculation of the electron-phonon (electron-ion in a more general case) coupling in materials based on tight-binding molecular dynamics simul…
Spectroscopic Signature of Chemical Bond Dissociation Revealed by Calculated Core-Electron Spectra
Ludger Inhester, Zheng Li, Xiaolei Zhu +2
The advent of ultrashort soft x-ray pulse sources permits the use of established gas phase spectroscopy methods to investigate ultrafast photochemistry in isolated molecules with e…
Various damage mechanisms in carbon and silicon materials under femtosecond x-ray irradiation
Nikita Medvedev, Viktor Tkachenko, Vladimir Lipp +2
We review the results of our research on damage mechanisms in materials irradiated with femtosecond free-electron-laser (FEL) pulses. They were obtained using our hybrid approach,…
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…
Thermal x-ray diffraction and near-field phase contrast imaging
Zheng Li, Anton Classen, Tao Peng +4
Using higher-order coherence of thermal light sources, the resolution power of standard x-ray imaging techniques can be enhanced. In this work, we applied the higher-order measurem…
Ultrafast Isomerization in Acetylene Dication: To Be or Not To Be
Zheng Li, Ludger Inhester, Chelsea Liekhus-Schmaltz +9
Experimental evidence has pointed toward the existence of ultrafast proton migration and isomerization as a key process for acetylene and its ions, however the actual mechanism for…
Radiation-damage-free ghost diffraction with atomic resolution
Zheng Li, Nikita Medvedev, Henry Chapman +1
The X-ray free electron lasers (XFEL) can enable diffractive structural determination of protein crystals or single molecules that are too radiation-sensitive for conventional X-ra…
Thermal and nonthermal melting of silicon under femtosecond x-ray irradiation
Nikita Medvedev, Zheng Li, Beata Ziaja
As it is known from visible light experiments, silicon under femtosecond pulse irradiation can undergo the so-called 'nonthermal melting' if the density of electrons excited from t…