TEMPUS, a Timepix4-based system for the event-based detection of X-rays

Autor: Jonathan Correa, Alexandr Ignatenko, David Pennicard, Sabine Lange, Sergei Fridman, Sebastian Karl, Leon Lohse, Björn Senfftleben, Ilya Sergeev, Sven Velten, Deepak Prajapat, Lars Bocklage, Hubertus Bromberger, Andrey Samartsev, Aleksandr Chumakov, Rudolf Rüffer, Joachim von Zanthier, Ralf Röhlsberger, Heinz Graafsma

Publikováno v: Journal of Synchrotron Radiation, Vol 31, Iss 5, Pp 1209-1216 (2024)

TEMPUS is a new detector system being developed for photon science. It is based on the Timepix4 chip and, thus, it can be operated in two distinct modes: a photon-counting mode, which allows for conventional full-frame readout at rates up to 40 kfps;

Externí odkaz: https://doaj.org/article/13b275c1ddfb48d2a63905d0ad75e992

Pressure tuning of charge ordering in iron oxide

Autor: Sergey V. Ovsyannikov, Maxim Bykov, Elena Bykova, Konstantin Glazyrin, Rudra Sekhar Manna, Alexander A. Tsirlin, Valerio Cerantola, Ilya Kupenko, Alexander V. Kurnosov, Innokenty Kantor, Anna S. Pakhomova, Irina Chuvashova, Aleksandr I. Chumakov, Rudolf Rüffer, Catherine McCammon, Leonid S. Dubrovinsky

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-11 (2018)

The charge order transition of commonly known magnetite has only recently been unraveled. Here, the measurement of the low-temperature high-pressure phase diagram of a related material (Fe4O5) elucidates the interplay of average oxidation state and c

Externí odkaz: https://doaj.org/article/001b75cacfa74f56b513f450e93f57b6

Stability of iron-bearing carbonates in the deep Earth’s interior

Autor: Valerio Cerantola, Elena Bykova, Ilya Kupenko, Marco Merlini, Leyla Ismailova, Catherine McCammon, Maxim Bykov, Alexandr I. Chumakov, Sylvain Petitgirard, Innokenty Kantor, Volodymyr Svitlyk, Jeroen Jacobs, Michael Hanfland, Mohamed Mezouar, Clemens Prescher, Rudolf Rüffer, Vitali B. Prakapenka, Leonid Dubrovinsky

Publikováno v: Nature Communications, Vol 8, Iss 1, Pp 1-9 (2017)

Carbonates are shown to exist in the lower mantle as seen in diamond inclusions, but thermodynamic constraints are poorly understood. Here, the authors synthesise two new iron carbonate compounds and find that self-oxidation-reduction reactions can p

Externí odkaz: https://doaj.org/article/a79c8bed1e1f4228b309b4cf46722b2c

Lattice Dynamics and Structural Phase Transitions in Eu2O3

Autor: J. Łażewski, J. Kalt, Svetoslav Stankov, Małgorzata Sternik, Aleksandr I. Chumakov, Rudolf Rüffer, Tilo Baumbach, Jörg Göttlicher, Przemysław Piekarz, Paweł T. Jochym

Publikováno v: Inorganic chemistry, 60 (13), 9571–9579

Using the density functional theory, we study the structural and lattice dynamical properties of europium sesquioxide ($Eu_{2}O_{3}$) in the cubic, trigonal, and monoclinic phases. The obtained lattice parameters and energies of the Raman modes show

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ef6e9459d9213ea05b25dc8748d3b2a
https://doi.org/10.1021/acs.inorgchem.1c00708

Space Charge-Limited Current Transport Mechanism in Crossbar Junction Embedding Molecular Spin Crossovers

Autor: Maria Fittipaldi, Alberto Cini, Enrico Berretti, Matteo Atzori, Patrick Rosa, Lorenzo Poggini, Mathieu Gonidec, Giuseppe Cucinotta, Alessandro Lavacchi, Niccolò Giaconi, Aleksandr I. Chumakov, Rudolf Rüffer, Matteo Mannini

Publikováno v: ACS Applied Materials & Interfaces
ACS Applied Materials & Interfaces, Washington, D.C. : American Chemical Society, 2020, 12 (28), pp.31696-31705. ⟨10.1021/acsami.0c07445⟩
ACS applied materials & interfaces (Online) 12 (2020): 31696–31705. doi:10.1021/acsami.0c07445
info:cnr-pdr/source/autori:Cucinotta G.; Poggini L.; Giaconi N.; Cini A.; Gonidec M.; Atzori M.; Berretti E.; Lavacchi A.; Fittipaldi M.; Chumakov A.I.; Ruffer R.; Rosa P.; Mannini M./titolo:Space Charge-Limited Current Transport Mechanism in Crossbar Junction Embedding Molecular Spin Crossovers/doi:10.1021%2Facsami.0c07445/rivista:ACS applied materials & interfaces (Online)/anno:2020/pagina_da:31696/pagina_a:31705/intervallo_pagine:31696–31705/volume:12

International audience; Spin crossover complexes are among the most studied classes of molecular switches and have attracted considerable attention for their potential technological use as active units in multifunctional devices. A fundamental step t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf19e733a0f11863b85962081a31553f
http://europepmc.org/articles/PMC8008390