Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Katharina, Ollefs"'
Autor:
Tobias Lojewski, Mohamed F. Elhanoty, Loïc Le Guyader, Oscar Grånäs, Naman Agarwal, Christine Boeglin, Robert Carley, Andrea Castoldi, Christian David, Carsten Deiter, Florian Döring, RobinY Engel, Florian Erdinger, Hans Fangohr, Carlo Fiorini, Peter Fischer, Natalia Gerasimova, Rafael Gort, Frank deGroot, Karsten Hansen, Steffen Hauf, David Hickin, Manuel Izquierdo, Benjamin E. Van Kuiken, Yaroslav Kvashnin, Charles-Henri Lambert, David Lomidze, Stefano Maffessanti, Laurent Mercadier, Giuseppe Mercurio, Piter S. Miedema, Katharina Ollefs, Matthias Pace, Matteo Porro, Javad Rezvani, Benedikt Rösner, Nico Rothenbach, Andrey Samartsev, Andreas Scherz, Justina Schlappa, Christian Stamm, Martin Teichmann, Patrik Thunström, Monica Turcato, Alexander Yaroslavtsev, Jun Zhu, Martin Beye, Heiko Wende, Uwe Bovensiepen, Olle Eriksson, Andrea Eschenlohr
Publikováno v:
Materials Research Letters, Vol 11, Iss 8, Pp 655-661 (2023)
The complex electronic structure of metallic ferromagnets is determined by a balance between exchange interaction, electron hopping leading to band formation, and local Coulomb repulsion. By combining high energy and temporal resolution in femtosecon
Externí odkaz:
https://doaj.org/article/a8b8fc91c84f4ed0a94c2f6f87e8b899
Autor:
Loïc Le Guyader, Andrea Eschenlohr, Martin Beye, William Schlotter, Florian Döring, Cammille Carinan, David Hickin, Naman Agarwal, Christine Boeglin, Uwe Bovensiepen, Jens Buck, Robert Carley, Andrea Castoldi, Alessandro D'Elia, Jan-Torben Delitz, Wajid Ehsan, Robin Engel, Florian Erdinger, Hans Fangohr, Peter Fischer, Carlo Fiorini, Alexander Föhlisch, Luca Gelisio, Michael Gensch, Natalia Gerasimova, Rafael Gort, Karsten Hansen, Steffen Hauf, Manuel Izquierdo, Emmanuelle Jal, Ebad Kamil, Suren Karabekyan, Thomas Kluyver, Tim Laarmann, Tobias Lojewski, David Lomidze, Stefano Maffessanti, Talgat Mamyrbayev, Augusto Marcelli, Laurent Mercadier, Giuseppe Mercurio, Piter S. Miedema, Katharina Ollefs, Kai Rossnagel, Benedikt Rösner, Nico Rothenbach, Andrey Samartsev, Justine Schlappa, Kiana Setoodehnia, Gheorghe Sorin Chiuzbaian, Lea Spieker, Christian Stamm, Francesco Stellato, Simone Techert, Martin Teichmann, Monica Turcato, Benjamin Van Kuiken, Heiko Wende, Alexander Yaroslavtsev, Jun Zhu, Serguei Molodtsov, Christian David, Matteo Porro, Andreas Scherz
Publikováno v:
Journal of Synchrotron Radiation, Vol 30, Iss 2, Pp 284-300 (2023)
Femtosecond transient soft X-ray absorption spectroscopy (XAS) is a very promising technique that can be employed at X-ray free-electron lasers (FELs) to investigate out-of-equilibrium dynamics for material and energy research. Here, a dedicated setu
Externí odkaz:
https://doaj.org/article/4a8d8d5850f140acaa6ff59e9499bd03
Autor:
Robin Y. Engel, Oliver Alexander, Kaan Atak, Uwe Bovensiepen, Jens Buck, Robert Carley, Michele Cascella, Valentin Chardonnet, Gheorghe Sorin Chiuzbaian, Christian David, Florian Döring, Andrea Eschenlohr, Natalia Gerasimova, Frank de Groot, Loïc Le Guyader, Oliver S. Humphries, Manuel Izquierdo, Emmanuelle Jal, Adam Kubec, Tim Laarmann, Charles-Henri Lambert, Jan Lüning, Jonathan P. Marangos, Laurent Mercadier, Giuseppe Mercurio, Piter S. Miedema, Katharina Ollefs, Bastian Pfau, Benedikt Rösner, Kai Rossnagel, Nico Rothenbach, Andreas Scherz, Justine Schlappa, Markus Scholz, Jan O. Schunck, Kiana Setoodehnia, Christian Stamm, Simone Techert, Sam M. Vinko, Heiko Wende, Alexander A. Yaroslavtsev, Zhong Yin, Martin Beye
Publikováno v:
Structural Dynamics, Vol 10, Iss 5, Pp 054501-054501-21 (2023)
Free-electron lasers provide bright, ultrashort, and monochromatic x-ray pulses, enabling novel spectroscopic measurements not only with femtosecond temporal resolution: The high fluence of their x-ray pulses can also easily enter the regime of the n
Externí odkaz:
https://doaj.org/article/bf861e61de0f448591cdacf838957377
Autor:
Thomas Feggeler, Ralf Meckenstock, Detlef Spoddig, Christian Schöppner, Benjamin Zingsem, Taddäus Schaffers, Hendrik Ohldag, Heiko Wende, Michael Farle, Andreas Ney, Katharina Ollefs
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-7 (2022)
Abstract We present the element-specific and time resolved visualization of uniform ferromagnetic resonance excitations of a Permalloy (Py) disk–Cobalt (Co) stripe bilayer microstructure. The transverse high frequency component of the resonantly ex
Externí odkaz:
https://doaj.org/article/f0df3de9d44e4c06ae9b3d38a5a8a2a9
Autor:
Benjamin Zingsem, Thomas Feggeler, Ralf Meckenstock, Detlef Spoddig, Taddäus Schaffers, Santa Pile, Hendrik Ohldag, Michael Farle, Heiko Wende, Andreas Ney, Katharina Ollefs
Publikováno v:
AIP Advances, Vol 13, Iss 4, Pp 045020-045020-7 (2023)
We present a statistically motivated method to extract magnonic contrast from time-resolved scanning transmission x-ray microscopy (TR-STXM) measurements. TR-STXM is an element-specific method for resolving spin-dynamics in space and time. It offers
Externí odkaz:
https://doaj.org/article/903983ec8d1e4fbda359c2afe78a8319
Autor:
Camiel van Efferen, Jan Berges, Joshua Hall, Erik van Loon, Stefan Kraus, Arne Schobert, Tobias Wekking, Felix Huttmann, Eline Plaar, Nico Rothenbach, Katharina Ollefs, Lucas Machado Arruda, Nick Brookes, Gunnar Schönhoff, Kurt Kummer, Heiko Wende, Tim Wehling, Thomas Michely
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
A charge density wave (CDW) normally creates a gap at the Fermi level, inducing a metal-insulator transition. Here, the authors report that a CDW gap resides in the unoccupied states but induces a topological metal-metal transition at the Fermi level
Externí odkaz:
https://doaj.org/article/0fe1cd1e04ef4ca6be5f8efac4c2e22e
Autor:
Vijaya Begum-Hudde, Tobias Lojewski, Nico Rothenbach, Benedikt Eggert, Andrea Eschenlohr, Katharina Ollefs, Markus E. Gruner, Rossitza Pentcheva
Publikováno v:
Physical Review Research, Vol 5, Iss 1, p 013199 (2023)
Based on density functional theory calculations, we model the x-ray absorption spectra of the O K edge and the Ti L_{2,3} edge in bulk SrTiO_{3}. Taking into account excitonic effects by solving the Bethe-Salpeter equation is found to be pivotal for
Externí odkaz:
https://doaj.org/article/d41d554fcade4d8e9d99a383f6126fbc
Autor:
Abhishek Sarkar, Benedikt Eggert, Leonardo Velasco, Xiaoke Mu, Johanna Lill, Katharina Ollefs, Subramshu S. Bhattacharya, Heiko Wende, Robert Kruk, Richard A. Brand, Horst Hahn
Publikováno v:
APL Materials, Vol 8, Iss 5, Pp 051111-051111-10 (2020)
High entropy oxides (HEOs) are single-phase solid solutions consisting of 5 or more cations in approximately equiatomic proportions. In this study, we show the reversible control of optical properties in a rare-earth (RE) based HEO-(Ce0.2La0.2Pr0.2Sm
Externí odkaz:
https://doaj.org/article/9a9d954fdb2840bf82d0aa6217bf74c4
Autor:
Stefan Giron, Nikita Pollin, Esmaeil Adabifiroozjaei, Yangyiwei Yang, Andras Kovacs, Trevor Almeida, Dominik Ohmer, Kaan Uestuener, Matthias Katter, Iliya Radulov, Rafal Dunin-Borkowski, Michael Farle, Karsten Durst, Hongbin Zhang, Lambert Alff, Katharina Ollefs, Bai-Xiang Xu, Oliver Gutfleisch, Leopoldo Molina-Luna, Konstantin Skokov, Baptiste Gault
Permanent magnets draw their properties from a complex interplay, across multiple length scales, of the composition and distribution of their constituting phases, that act as building blocks, each with their associated intrinsic properties 1. Gaining
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::047aa682bdf33f70108d9031437fe065
https://doi.org/10.21203/rs.3.rs-2873882/v1
https://doi.org/10.21203/rs.3.rs-2873882/v1
Autor:
Kasper S. Pedersen, Jesper Bendix, Alain Tressaud, Etienne Durand, Høgni Weihe, Zaher Salman, Thorbjørn J Morsing, Daniel N. Woodruff, Yanhua Lan, Wolfgang Wernsdorfer, Corine Mathonière, Stergios Piligkos, Sophia I. Klokishner, Serghei Ostrovsky, Katharina Ollefs, Fabrice Wilhelm, Andrei Rogalev, Rodolphe Clérac
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-8 (2016)
Iridates are known to exhibit a range of exotic electronic and magnetic behaviours but it is difficult to prepare isolated [IrO6]8− species via soft chemical routes. Here, the authors isolate the isoelectronic [IrF6]2−complex, and assess it as a
Externí odkaz:
https://doaj.org/article/7c58a1eb9cd241d7abb9b1557d05237c