Biography
Eugenio Paris is a Beamline Scientist of the Ultrafast Spectroscopy of Condensed Matter Group. Eugenio obtained his M.Sc. and Ph.D. in Physics from the University of Rome “La Sapienza”, where he worked under the supervision of Prof. Naurang L. Saini. During his doctoral studies, he investigated the interplay between local lattice distortions and electronic properties of novel superconductors and other functional materials using a range of experimental techniques, including x-ray absorption (EXAFS, XANES) and angle-resolved photoemission. In 2017, he joined the Paul Scherrer Institute as a postdoctoral researcher, focusing on the study of elementary excitations in transition metal oxides using Resonant Inelastic X-ray Scattering (RIXS) in both static and ultrafast domains. Since 2020, he has led the design, commissioning, and operation of a soft x-ray RIXS instrument at the Furka endstation of the Athos beamline at the SwissFEL.
Scientific Research
Eugenio Paris's research explores novel phenomena arising from the collective interactions among electrons in solids and from the interplay between multiple degrees of freedom. His experimental work uses resonant spectroscopy and scattering techniques in both static and ultrafast domains to obtain energy-, momentum-, and time-resolved information. Current research topics include the role of local structural distortions in superconductors and high spin-orbit coupled oxides, as well as the use of light pulses to explore and manipulate quantum states in complex materials.
Selected Publications
For an extensive overview we kindly refer you to our publication repository DORA (includes publications since joining PSI).
Coexistence of Insulatorlike Paramagnon and Metallic Spin-Orbit Exciton Modes in SrIrO3, E. Paris, W. Zhang, Y. Tseng, A. Efimenko, C. Sahle, V. N. Strocov, E. Skoropata, K. Rolfs, T. Shang, J. Lyu, E. Pomjakushina, M. Medarde, H. M. Rønnow, B. Normand, M. Radovic, and T. Schmitt, Physical Review Letters 135, 186506 (2025)
Momentum-resolved spin-conserving two-triplon bound state and continuum in a cuprate ladder, Y. Tseng, E. Paris, K. P. Schmidt, W. Zhang, T. C. Asmara, R. Bag, V. N. Strocov, S. Singh, J. Schlappa, H. M. Rønnow and T. Schmitt, Communications Physics 6, 138 (2023)
Probing the interplay between lattice dynamics and short-range magnetic correlations in CuGeO3 with femtosecond RIXS, E. Paris, C. W. Nicholson, S. Johnston, Y. Tseng, M. Rumo, G. Coslovich, S. Zohar, M. F. Lin, V. N. Strocov, R. Saint-Martin, A. Revcolevschi, A. Kemper, W. Schlotter, G. L. Dakovski, C. Monney and T. Schmitt, npj Quantum Materials 6, 51 (2021)
Strain engineering of the charge and spin-orbital interactions in Sr2IrO4, E. Paris, Y. Tseng, E. M. Pärschke, W. Zhang, M. H. Upton , A. Efimenko, K. Rolfs, D. E. McNally, L. Maurel, M. Naamneh, M. Caputo, V. N. Strocov, Z. Wang, D. Casa, C. W. Schneider, E. Pomjakushina, K. Wohlfeld, M. Radovic, and T. Schmitt, Proceedings of the National Academy of Sciences 117, 24764 (2020).
Orbital dynamics during an ultrafast insulator to metal transition, S. Parchenko*, E. Paris*, D. E. McNally, E. Abreu, M. Dantz, E. M. Bothschafter, A. H. Reid, W. F. Schlotter, M.-F. Lin, S. F. Wandel, G. Coslovich, S. Zohar, G. L. Dakovski, J. J. Turner, S. Moeller, Y. Tseng, M. Radovic, C. Saathe, M. Agaaker, J. E. Nordgren, S. L. Johnson, T. Schmitt, and U. Staub, Physical Review Research 2, 023110 (2020) (* equally contributing).
High-pressure x-ray absorption and diffraction study of the self-doped superconductor EuFBiS2, E. Paris, B. Joseph, C. Marini, K. Terashima, T. Wakita, T. Yokoya, Y. Mizuguchi, T. Mizokawa and N. L. Saini, Physical Review B 101, 214526 (2020).
The local structure of the Ca0.9Pr0.1Fe2As2 superconductor as a function of temperature, E. Paris, T. Wakita, L. Simonelli, C. Marini, W. Olszewski, K. Terashima, F. Stramaglia, G. M. Pugliese, T. Mizokawa, S. Ioka, K. Kudo, M. Nohara, T. Yokoya and N. L. Saini, Superconductor Science and Technology 32, 095001 (2019).
Suppression of structural instability in LaOBiS2-xSex by Se substitution, E. Paris, Y. Mizuguchi, T. Wakita, K. Terashima, T. Yokoya, T. Mizokawa and N. L. Saini, Journal of Physics: Condensed Matter 30, 455703 (2018).
Distinct local structure of superconducting Ca10M4As8(Fe2As2)5 (M = Pt, Ir), E. Paris, T. Wakita, O. Proux, T. Yokoya, K. Kudo, D. Mitsuoka, T. Kimura, K. Fujimura, N. Nishimoto, S. Ioka, M. Nohara, T. Mizokawa, and N. L. Saini, Physical Review B 96, 224507 (2017).
Role of the local structure in superconductivity of LaO0.5F0.5BiS2-xSex system, E. Paris, Y. Mizuguchi, M. Y. Hacisalihoglu, T. Hiroi, B. Joseph, G. Aquilanti, O. Miura, T. Mizokawa and N. L. Saini, Journal of Physics: Condensed Matter 29, 145603 (2017).
Electronic structure of self-doped layered Eu3F4Bi2S4 material revealed by x-ray absorption spectroscopy and photoelectron spectromicroscopy, E. Paris, T. Sugimoto, T. Wakita, A. Barinov, K. Terashima, V. Kandyba, O. Proux, J. Kajitani, R. Higashinaka, T. D. Matsuda, Y. Aoki, T. Yokoya, T. Mizokawa, and N. L. Saini, Physical Review B 95, 035152 (2017).
Temperature dependent local atomic displacements in ammonia intercalated iron selenide superconductor, E. Paris, L. Simonelli, T. Wakita, C. Marini, J.-H. Lee, W. Olszewski, K. Terashima, T. Kakuto, N. Nishimoto, T. Kimura, K. Kudo, T. Kambe, M. Nohara, T. Yokoya, and N. L. Saini, Scientific Reports 6, 27646 (2016).