Publikationen

Wissenschaftliche Highlights

time-reversal symmetry breaking
Science Advances 10, 5 (2024)
Chirality
accepted to PRL (2025).
Electron-phonon coupling
Phys. Rev. B 108, 115150 (2023).
Direct Observation of Antiferromagnetic Parity Violation in the Electronic Structure of Mn2Au
J. Phys. Condensed Matter 34, 425501 (2022).
XPG Graphite
New J. of Phys. 21, 113031 (2019).
CDAD for W(110)
New J. of Phys. 21, 013017 (2019).
Valence transition induced changes of the electronic structure in EuPd2Si2
J. Phys. Rev. B 109, 085130 (2024)

Publikationen

2026

  1. O. Tkach, S. Fragkos, D. Biswas, J. Liu, O. Fedchenko, Y. Lytvynenko, S. Babenkov, D. Zimmer, Q.L. Nguyen et al., Multimode objective lens for momentum microscopy and x-ray photoemission electron microscopy: Experiments
  2. Y. Lytvynenko, A. Akashdeep, T.P. Vo, O. Tkach, S.V. Chernov, A. Gloskovskii, C. Schlueter, C. Luo, V. Ukleev, F. Radu, F. Kronast, T. Hiroto, A. Winkelmann, J. Minár, M. Kläui, G. Schönhense, G. Jakob, H.J. Elmers, O. Fedchenko, Magnetic circular dichroism in core-level x-ray photoelectron spectroscopy of altermagnetic RuO 2 films
  3. O. Fedchenko, T.-P. Vo, O. Tkach, A. Pulkkinen, D. Sébilleau, A. Winkelmann, Y. Lytvyenenko, H.-J. Elmers, G. Schönhense & J. Minár Unveiling fine structure and energy-driven transition of photoelectron Kikuchi diffraction

2025

  1. H.J. Elmers, O. Tkach, Y. Lytvynenko, M. Schmitt, D. Biswas, J. Liu, S.V. Chernov, M. Hoesch, D. Kutnyakov, N. Wind, L. Wenthaus, M. Scholz, K. Rossnagel, A. Gloskovskii, C. Schlueter, A. Winkelmann, A. Haghighirad, T.-L. Lee, M. Sing, R. Claessen, M. Le Tacon, J. Demsar, G. Schönhense, O. Fedchenko, Chirality in the Kagome metal CsV3Sb5, accepted to PRL (2025).
  2. O. Fedchenko, Y.-J. Song, O. Tkach, Y. Lytvynenko, S.V. Chernov, A. Gloskovskii, C. Schlueter, M. Peters, K. Kliemt, C. Krellner, R. Valenti, G. Schönhense, and H.J. Elmers, The electronic structure of EuPd2Si2 in the vicinity of the critical endpoint, Submited to PRB (2025).
  3. O. Fedchenko, H.J. Elmers, O. Tkach, Y. Lytvynenko, H. Agarwal, D. Biswas, J. Liu, A.-A. Haghighirad, M. Merz, S. Pakhira, G. Garbarino, T.-L. Lee, J. Demsar, G. Schönhense, M. Le Tacon, Orbital magnetization in the Nb-substituted kagome metal CsV 3 Sb 5 (2025)
  4. O. Fedchenko, T.-P. Vo, S. Tricot, D. Sébilleau, J. Braun, A. Pulkkinen, A. Winkelmann, O. Tkach, Y. Lytvynenko, D. Vasilyev, H.-J. Elmers, G. Schönhense, J. Minár, Layered multiple scattering approach to Hard X-ray photoelectron diffraction: theory and application (2025)
  5. O. Fedchenko, Y.-J. Song, O. Tkach, Y. Lytvynenko, S.V. Chernov, A. Gloskovskii, C. Schlueter, M. Peters, R. Möller, A. Kraiker, K. Kliemt, C. Krellner, R. Valentí, G. Schönhense, H.J. Elmers, Electronic structure of EuPd 2 Si 2 in the vicinity of the critical endpoint (2025)
  6. O. Fedchenko, M. Schmitt, D. Biswas, O. Tkach, J. Liu, H.-J. Elmers, M. Sing, R. Claessen, T.-L. Lee, G. Schönhense, Momentum microscopy with combined hemispherical and time-of-flight electron analyzers at the soft X-ray beamline I09 of the diamond light source (2025)
  7. O. Fedchenko, P. Rosenberger, A. Darmawan, O. Tkach, S. V. Chernov, D. Kutnyakhov, M. Hoesch, M. Scholz, K. Rossnagel, R. Pentcheva, G. Schönhense, H.-J. Elmers & M. Müller Spin polarization of the two-dimensional electron gas at the EuO/SrTiO3 (001) interface
  8. O. Fedchenko, A. Fuhrberg, P. M. Düring, O. Tkach, Y. Lytvynenko, G. Schönhense, H.-J. Elmers, A. Gloskovskii, K. Gradwohl, S. Chernov, C. Schlueter & M. Müller Ge_1−xSi_x single crystals for Ge hole spin qubit integration

2024

  1. O. Fedchenko, J. Minár, A. Akashdeep, S.W. D’Souza, D. Vasilyev, O. Tkach, L. Odenbreit, Q.L. Nguyen, D. Kutnyakhov, N. Wind, L. Wenthaus, M. Scholz, K. Rossnagel, M. Hoesch, M. Aeschlimann, B. Stadtmüller, M. Kläui, G. Schönhense, G. Jakob, T. Jungwirth, L. Smejkal, J. Sinova and H. J. Elmers, Observation of time-reversal symmetry breaking in the band structure of altermagnetic RuO2, Science Advances 10, 5 (2024).
  2. O. Fedchenko, Y.-J. Song, O. Tkach, Y. Lytvynenko, S. V. Chernov, A. Gloskovskii, C. Schlueter, K. Kliemt, C. Krellner, R. Valenti, G. Schönhense and H.J. Elmers, Valence transition induced changes of the electronic structure in EuPd2Si2, Phys. Rev. B 109, 085130 (2024).
  3. O. Tkach, S. Chernov, S. Babenkov, Y. Lytvynenko, O. Fedchenko, K. Medjanik, D. Vasilyev, A. Gloskowskii, C. Schlueter, H. J. Elmers and G. Schönhense, Asymmetric Electrostatic Dodecapole: compact bandpass filter with low aberrations for momentum microscopy, J. Synchrotron Radiat., 31, 4, 829 (2024).
  4. O. Fedchenko, F. K. Diekmann, P. Rüßmann, M. Kallmayer, L. Odenbreit, S.M. Souliou, M. Frachet, A. Winkelmann, M. Merz, S. Chernov, D. Vasilyev, D. Kutnyakhov, O. Tkach, Y. Lytvynenko, K. Medjanik, C. Schlueter, A. Gloskovskii, T.R.F. Peixoto, M. Hoesch, M. Le Tacon, Y. Mokrousov, K. Roßnagel, G. Schönhense and H.-J.- Elmers, Doping-Induced Electronic and Structural Phase Transition in the Bulk Weyl semimetal Mo1-xWxTe2 under review in PRB (2024).
  5. M. Schmitt, D. Biswas, O. Tkach, O. Fedchenko, J. Liu, H.-J. Elmers, M. Sing, R. Claessen, T.-L. Lee, G. Schönhense, Hybrid Photoelectron Momentum Microscope at the Soft X-ray Beamline I09 of the Diamond Light Source. Research Gate, June 2024, and under review.

2023

  1. O. Fedchenko, D. Vasilyev, D. Kutnyakhov, S. Babenkov, S. Chernov, T. Grunske, T. Kauerhof, K. von Volkmann, J. Demsar, K. Rossnagel, G. Schönhense and H. J. Elmers, Electron-phonon coupling at the Te 5p-hole pocket in TiTe2, Phys. Rev. B 108, 115150 (2023).
  2. Y. Lytvynenko, O. Fedchenko, S. V. Chernov, S. Babenkov, D. Vasilyev, O. Tkach, A. Gloskovskii, T. R. F. Peixoto, C. Schlueter, V. Grigorev, M. Filianina, S. Sobolev, A. Kleibert, M. Kläui,  J. Demsar, G. Schönhense, M. Jourdan and H. J. Elmers, Control of the asymmetric band structure in Mn2Au by a ferromagnetic driver layer, Phys. Rev. B 108, 104413 (2023).
  3. M. Hoesch, O. Fedchenko, M. Wang, C. Schlueter, D. Potorochin, K. Medjanik, S. Babenkov, A. S. Ciobanu, A. Winkelmann, H.-J. Elmers, S. Zhou, M. Helm and G. Schönhense, Active sites of hyperdoped Te:Si(001) by hard x-ray photoelectron spectroscopy, Appl. Phys. Lett., 122, 252108 (2023).
  4. O. Yastrubchak, N. Tataryn, L Gluba, S. Mamykin, J. Sadowski, T. Adreanczyk, O. Kondratenko, V. Romanyuk, O. Fedchenko, Y. Lytvynenko, O. Tkach, D. Vasilyev, S. Babenkov, K. Medjanik, M. Sawicki, T. Wosinski, G. Schönhense and H.-J. Elmers, Influence of Bi Doping on the Electronic Structure of (Ga,Mn)As Epitaxial Layers, Scientific Reports 13, 17278 (2023).
  5. O. Tkach, T. P. Vo, O. Fedchenko, K. Medjanik, Y. Lytvynenko, S. Babenkov, D. Vasilyev, Q. L. Nguyen, T. Peixoto, A. Gloskowski, C. Schlueter, M. Hoesch, D. Kutnyakhov, M. Scholz, L. Wenthaus, N. Wind, S. Marotzke, A. Winkelmann, K. Rossnagel, J. Minar, H.-J. Elmers and G. Schönhense, Circular Dichroism in Hard-X-ray Photoelectron Kikuchi Diffraction observed by ToF Momentum Microscopy, Ultramicroscopy 250, 113750 (2023).
  6. H.-J. Elmers, S. Haldar, K. Medjanik, S. Babenkov, O. Fedchenko, D. Vasilyev, S. Heinze and G. Schönhense, Critical behavior and exchange splitting in the two-dimensional antiferromagnet Mn on Re(0001), Phys. Rev. B 107, 144424 (2023).
     

2022

  1. O. Fedchenko, L. Smejkal, M. Kallmayer, Ya. Lytvynenko, K. Medjanik, S. Babenkov, D. Vasilyev, M. Kläui, J. Demsar, G. Schönhense, M. Jourdan, J. Sinova and H.-J. Elmers, Direct Observation of Antiferromagnetic Parity Violation in the Electronic Structure of Mn2Au, J. Phys. Condensed Matter 34, 425501 (2022).
  2. S. Kölsch, A. Schuck, O. Fedchenko, D. Vasilyev, S. Chernov, O. Tkach, C. Schlueter, T. R. F. Peixoto, A. Gloskowski, H. J. Elmers, G. Schönhense, C. Krellner and M. Huth, Clamping effect on temperature-induced valence transition in epitaxial EuPd2Si2 thin films grown on MgO(001), Phys. Rev. Materials 6, 115003 (2022).
  3. M. Zapf, M. Schmitt, J. Gabel, P. Scheiderer, M. Stübinger, G. Sangiovanni, L. Dudy, S. Chernov, S. Babenkov, D. Vasilyev, O. Fedchenko, K. Medjanik, Yu. Matveyev, A. Gloskowski, C. Schlueter, T.-L. Lee, H.-J. Elmers, G. Schönhense, M. Sing and R. Claessen, Hard X-ray angle-resolved photoemission from a buried high-mobility electron system, Phys. Rev. B 106, 125137 (2022).
  4. O. Fedchenko, A. Winkelmann and G. Schönhense, Structure Analysis using Time-of-Flight Momentum Microscopy with Hard X-rays: Status and Prospects, J. Phys. Soc. Jpn. 91, 091006 (2022). 

2021

  1. G. Schönhense, K. Medjanik, O. Fedchenko, A. Zymaková, S. Chernov, D. Kutnyakhov, D. Vasilyev, S. Babenkov, H. J. Elmers, P. Baumgärtel, P. Goslawski, G. Öhrwall, T. Grunske, T. Kauerhof, K. von Volkmann, M. Kallmayer, M. Ellguth and A. Oelsner, Time-of-Flight Photoelectron Momentum Microscopy with 80-500 MHz Photon Sources: Electron-Optical Pulse Picker or Bandpass Pre-Filter, J. of Synchr. Radiation 28, 1891 (2021).
  2. M. Schmitt, O. Kirilmaz, S. Chernov, S. Babenkov, D. Vasilyev, O. Fedchenko, K. Medjanik, Yu. Matveyev, A. Gloskovskii, C. Schlueter, A. Winkelmann, L. Dudy, H. J. Elmers, G. Schönhense, M. Sing and R. Claessen, Bulk Spin Polarization of Magnetite from Spin-Resolved Hard X-Ray Photoelectron Spectroscopy, Phys. Rev. B 104, 045129 (2021).
  3. S. Y. Agustsson, S. V. Chernov, K. Medjanik, S. Babenkov, O. Fedchenko, D. Vasilyev, C. Schlueter, A. Hloskovskii, Yu. Matveyev, K. Kliemt, C. Krellner, J. Demsar, G. Schönhense and H.-J. Elmers, Temperature-dependent Change of the Electronic Structure in the Kondo Lattice System YbRh2Si2, J. Phys. Condens. Matter 33, 205601 (2021).
  4. G. Schönhense, D. Kutnyakhov, F. Pressacco, M. Heber, N. Wind, S. Y. Agustsson, S. Babenkov, D. Vasilyev, O. Fedchenko, S. Chernov, L. Rettig, B. Schönhense, L. Wenthaus, G. Brenner, S. Dziarzhytski, S. Palutke, S. K. Mahatha, N. Schirmel, H. Redlin, B. Manschwetus, I. Hartl, Yu. Matveyev, A. Gloskovskii, C. Schlueter, V. Shokeen, H. Duerr, T. K. Allison, M. Beye, K. Rossnagel, H.-J. Elmers and K. Medjanik, Suppression of the vacuum space-charge effect in fs-photoemission by a retarding electrostatic front lens, Rev. Sci. Instrum. 92, 053703 (2021).
  5. S. Chernov, C. Lidig, O. Fedchenko, K. Medjanik, S. Babenkov, D. Vasilyev, M. Jourdan, G. Schönhense and H. J. Elmers, Band structure tuning of Heusler compounds: Spin- and momentum-resolved electronic structure analysis of compounds with different band filling, Phys. Rev. B 103, 054407 (2021).
  6. K. Medjanik, O. Fedchenko, O. Yastrubchak, J. Sadowski, M. Sawicki, L. Gluba,  D. Vasilyev, S. Babenkov, S. Chernov, A. Winkelmann, H. J. Elmers and G. Schönhense, Site-specific Atomic Order and Band Structure Tailoring in the Diluted Magnetic Semiconductor (In,Ga,Mn)As, Phys. Rev. B 103, 075107 (2021).

2020

  1. H. J. Elmers, S. V. Chernov, S. W. Dsouza, S. P. Bommanaboyena, S. Yu. Bodnar, K. Medjanik, S. Babenkov, O. Fedchenko, D. Vasilyev, S. Y. Agustsson, C. Schlueter, A. Glos-kovskii, Yu. Matveyev, V. N. Strocov, Y. Skourski, L. Smejkal, J. Sinova, J. Minar, M. Kläui, G. Schönhense and M. Jourdan, Néel vector induced manipulation of valence states in the collinear antiferromagnet Mn2Au, ACS Nano 14, 17554 (2020).
  2. O. Fedchenko, A. Winkelmann, S. Chernov, K. Medjanik, S. Babenkov, S. Agustsson, D. Vasilyev, M. Hoesch, H.-J. Elmers and G. Schönhense, Emitter-Site Specificity of Hard X-Ray Photoelectron Kikuchi-Diffraction, New J. of Phys. 22, 103002 (2020).
  3. H.-J. Elmers, J. Regel, T. Mashof, J. Braun, S. Babenkov, S. Chernov, O. Fedchenko, K. Medjanik, D. Vasilyev, J. Minar, H. Ebert and G. Schönhense, Rashba splitting of the Tamm surface state on Re(0001) observed by spin-resolved photoemission and scanning tunnelling spectroscopy, Phys. Rev. Research 2, 013296 (2020).
  4. G. Schönhense, K. Medjanik, S. Babenkov, D. Vasilyev, M. Ellguth, O. Fedchenko, S. Chernov, B. Schönhense and H.-J. Elmers, Momentum-Transfer Model of Valence-Band Photoelectron Diffraction, Comms. Phys. 3, 45 (2020).
  5. O. Fedchenko, S. Chernov, G. Schönhense, R. Hahn and D. Comparat, Narrow-Band Pulsed Electron Source Based on Near-Threshold Photoionization of Cs in a Magneto-Optical Trap, Phys. Rev. A 101, 013424 (2020).
     

2019

  1. M. Mankos, K. Shadman, R. Hahn, Y. J. Picard, D. Comparat, O. Fedchenko, G. Schönhense, L. Amiaud, A. Lafosse and N. Barrett, Design for a high resolution electron energy loss microscope, Ultramicrosc. 207, 112848 (2019).
  2. O. Fedchenko, A. Winkelmann, K. Medjanik, S. Babenkov, D. Vasilyev, S. Chernov, C. Schlueter, A. Gloskovskii, Yu. Matveyev, W. Drube, B. Schönhense, H. J. Elmers and G. Schönhense, High-resolution hard-X-ray Photoelectron Diffraction in a Momentum Microscope - the Model Case of Graphite, New J. of Phys. 21, 113031 (2019).
  3. O. Fedchenko, K. Medjanik, S. Chernov, D. Kutnyakhov, M. Ellguth, A. Oelsner, B. Schönhense, T. Peixoto, P. Lutz, C.-H. Min, F. Reinert, S. Däster, Y. Acremann, J. Viefhaus, W. Wurth, J. Braun, J. Minár, H. Ebert, H. J. Elmers and G. Schönhense, 4D texture of circular dichroism in soft-x-ray photoemission from tungsten, New J. of Phys. 21, 013017 (2019).