Speaker : Amélie JUHIN (Institut de Minéralogie, Physique des Matériaux et Cosmochimie (IMPMC). CNRS-Sorbonne Université)
Abstract : X-ray spectroscopies performed at synchrotron light sources, such as X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering are powerful tools to study complex materials, due to their chemical selectivity that allows disentangling the respective contributions of different atomic species. In this talk, I will show how the use of incident polarized x-rays (either linear or circular) can allow a deeper understanding of the electronic structure and reveal emergent properties, with a focus on remarkable magnetic nanomaterials: Single Molecule Magnets, bimagnetic nanoparticles, ferrofluids, ultra-thin nanowires. Moreover, I will illustrate how the combination of these spectroscopies with x-ray microscopy can provide valuable information with nanoscale spatial resolution, exemplified by recent results obtained on magnetotactic organisms.
On the program, small games during the aperitif: chips/beers/soft drinks. Then on the menu, knacks and potatoes salad and slightly longer games, ice cream and fruits for dessert. Veggie and vegan option will be proposed as well. Do not hesistate to bring your own favorite games with you and to make them us discover! In any case, a selection of boardgames will be at your disposal and we will take the time to explain you their rules. Happiness and friendliness will be the words of this event !
Participations fees are of 5 euros, or 3 euros if you are ADDEPT members (possibility to get the membership card during registration)
The courses will take place over three full days and will include frontal teaching (ca. 18h) and a session of exercises and Q&A (ca. 3 h), delivered by local, national and international experts. The language will be English.
List of speakers:
Pr. Vincent Robert (LCQ, Université de Strasbourg & CNRS)
Pr. Stefan Haacke (IPCMS-DON, Université de Strasbourg & CNRS)
Dr. Chantal Daniel (LCQ, Université de Strasbourg & CNRS)
Pr. Lorenzo Di Bari (Dept. of Chemistry, University of Pisa, Italie)
Pr. Ally Aukauloo (ICMMO, Université Paris-Saclay)
Dr. Pascal Didier (Faculté de Pharmacie, Université de Strasbourg & CNRS)
Pr. Federico Polo (DMSN, Ca’ Foscari University of Venice, Italie)
Dr. Giulio Ragazzon (ISIS, Université de Strasbourg & CNRS)
Dr. Alberto Barsella (IPCMS-DON, Université de Strasbourg & CNRS)
Dr. Loïc Mager (IPCMS-DON, Université de Strasbourg & CNRS)
Dr. Jérémie Léonard (IPCMS-DON, Université de Strasbourg & CNRS)
Dr. Matteo Mauro (IPCMS-DMO, Université de Strasbourg & CNRS)
Center for Quantum Nanoscience, Institute for Basic Science (IBS) Department of Physics, Ewha Womans University Seoul, Republic of Korea
Résumé:
There is a strong international research effort in the area of quantum information science. Here, the concepts of quantum coherence, superposition and entanglement of quantum states are exploited. These concepts were originally shown with photons as well as atoms and ions in vacuum traps. Over the past two decades, many advances at studying such quantum coherence in solid-state and molecular architectures have evolved [1]. In this talk we will focus on quantum-coherent experiments in Scanning Tunneling Microscopy (STM). STM enables the study of surfaces with atomic-scale spatial resolution and offers the ability to study individual atoms and molecules on surfaces. Here at Ewha, we have one of the world’s best facilities for such studies. STM can also be used to move atoms with atomic-scale precision, which enables us to build engineered nanostructures where each atom is in the exactly correct place. In order to study qubits with STM, we recently learned how to combine STM with electron spin resonance [2,3]. Spin resonance gives us the means to quantum-coherently control an individual atomic or molecular spin on a surface. Using short pulses of microwave radiation further enables us to perform qubit rotations and learn about the quantum coherence times of our spins [4]. Finally, we will finish with unpublished results on multi-qubit operations with spins on surfaces. 1. Andreas J. Heinrich, William D. Oliver, Lieven M. K. Vandersypen, Arzhang Ardavan, Roberta Sessoli, Daniel Loss, Ania Bleszynski Jayich, Joaquin Fernandez-Rossier, Arne Laucht, Andrea Morello, “Quantum-coherent nanoscience”, Nature Nanotechnology, 16, 1318-1329 (2021). 2. Susanne Baumann, William Paul, Taeyoung Choi, Christopher P. Lutz, Arzhang Ardavan, Andreas J. Heinrich, “Electron Paramagnetic Resonance of Individual Atoms on a Surface”, Science 350, 417 (2015). 3. Yi Chen, Yujeong Bae, Andreas Heinrich, “Harnessing the Quantum Behavior of Spins on Surfaces”, Advanced Materials 2022, 2107534 (2022). 4. Kai Yang, William Paul, Soo-Hyon Phark, Philip Willke, Yujeong Bae, Taeyoung Choi, Taner Esat, Arzhang Ardavan, Andreas J. Heinrich, and Christopher P. Lutz, “Coherent spin manipulation of individual atoms on a surface”, Science 366, 509 (2019).
Support from Institute for Basic Science (IBS-R027-D1) is gratefully acknowledged
