14 citations · 41 across the 19 of their papers we have counts for
8 papers · 1 filter
Floquet-Bloch Valleytronics
Sotirios Fragkos, Baptiste Fabre, Olena Tkach +6
Driving quantum materials out-of-equilibrium makes it possible to generate states of matter inaccessible through standard equilibrium tuning methods. Upon time-periodic coherent dr…
Layered Multiple Scattering Approach to Hard X-ray Photoelectron Diffraction: Theory and Application
Trung-Phuc Vo, Olena Tkach, Sylvain Tricot +10
Photoelectron diffraction (PED) is a powerful and essential experimental technique for resolving the structure of surfaces with sub-angstrom resolution. In the high energy regime,…
The electronic structure of EuPdSi in the vicinity of the critical endpoint
O. Fedchenko, Y. -J. Song, O. Tkach +10
Hard X-ray angle-resolved photoemission spectroscopy reveals significant alterations in the valence band states of EuPdSi at a temperature , where the Eu ions undergo…
Spin polarization of the two-dimensional electron gas at the EuO/SrTiO interface
Paul Rosenberger, Andri Darmawan, Olena Fedchenko +10
Spin-polarized two-dimensional electron gases (2DEGs) are of particular interest for functional oxide electronics applications. The redox-created 2DEG residing on the strontium tit…
Chirality in the Kagome Metal CsVSb
H. J. Elmers, O. Tkach, Y. Lytvynenko +22
Using x-ray photoelectron diffraction (XPD) and angle-resolved photoemission spectroscopy, we study photoemission intensity changes related to changes in the geometric and electron…
Multi-Mode Lens for Momentum Microscopy and XPEEM: Theory
Olena Tkach, Gerd Schoenhense
The strong electric field between the sample and the extractor is the core of cathode lenses and a pivotal determinant of high resolution. Nevertheless, fields in the range of 3-8…
Hybrid Photoelectron Momentum Microscope at the Soft X-ray Beamline I09 of the Diamond Light Source
Matthias Schmitt, Deepnarayan Biswas, Olena Tkach +7
Soft X-ray momentum microscopy of crystalline solids is a highly efficient approach to map the photoelectron distribution in four-dimensional (E,k) parameter space over the entire…
Multimode Objective Lens for Momentum Microscopy and XPEEM: Experiments
O. Tkach, S. Fragkos, D. Biswas +37
A new type of objective lens has recently been proposed for use in X-ray photoemission electron microscopes (XPEEMs) and momentum microscopes. Adding a ring electrode concentric wi…