Kiel Nano, Surface and Interface Science (KiNSIS)

Termine & Veranstaltungen

Lattice, correlations and order: Controlling (with) Dirac fermions (Prof. Tim Wehling, University of Hamburg)

30.11.2021 ab 16:15

Hybrid, Physikalisches Kolloquium

WehlingThe interplay of electronic correlations, lattice degrees of freedom and topology holds the promise for the realization of exotic states of quantum matter. Here, we discuss how to disentangle and how to control this interplay on the atomic scale. We will first address doping fingerprints of superconductivity arising from spin and lattice fluctuations in moiré superlattice systems [1]. We will show how confinement and deconfinement present pathways to create and control correlated Dirac fermions via superlattice engineering [2]. In turn, we show how in turn “Diracness” can control the spontaneous emergence of superlattices in charge density wave compounds [3].

[1] N. Witt, J. M. Pizarro, T. Nomoto, R. Arita, T. O. Wehling, arXiv:2108.01121 (2021)
[2] J. M. Pizarro, S. Adler, K. Zantout, T. Mertz, P. Barone, R. Valentí, G. Sangiovanni, T. O. Wehling, npj Quantum Materials 5, 79 (2020)
[3] J. Berges, E. G. C. P. van Loon, A. Schobert, M. Rösner, and T. O. Wehling, Phys. Rev. B 101, 155107 (2020)

Der Hybrid-Vortrag ist Teil des Physikalischen Kolloquiums der Sektion Physik der CAU. Alle Interessierten sind herzlich eingeladen: Geiger Lecture Hall (Leibnizstrasse 15), Kiel oder www.physik.uni-kiel.de/de/veranstaltungen/physikalisches-kolloquium

 

Einladender: Fabio Caruso

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Controlled release with nanosized drug delivery systems: concepts and performance (Karsten Mäder, Universität Halle, Pharmazeutische Technologie)

01.12.2021 von 12:00 bis 13:00

Online, KiNSIS Kolloquium

KiNSIS LogoKiNSIS-Mitglieder erhalten etwa eine Woche vorher den Link zum Vortrag auf Zoom per E-Mail.

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Prof. Dr. Jaeyoung Lee, Gwangju Institute of Science and Technology - South Korea

02.12.2021 von 17:00 bis 18:00

Otto-Hahn-Platz 5, Chemiehörsaal II

Registration: two weeks before the presentation at our openOLAT page. Limited to 30 people. You can apply at the menu item “Registration” of our openOLAT page, if you would like to receive announcements of the GDCh local section Kiel per e-mail, for instance, links for the next online presentations and events.

Teil des GDCh-Kolloquiums der Sektion Chemie.

Malte Behrens

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Ab-initio description of Warm Dense Matter: Goals, challenges, and opportunities (Dr. Tobias Dornheim, Helmholtz-Zentrum Dresden-Rossendorf)

07.12.2021 ab 16:15

Hybrid, Physikalisches Kolloquium

DornheimDr. Tobias Dornheim (Center for Advanced Systems Understanding (CASUS) Görlitz, Helmholtz-Zentrum Dresden-Rossendorf (HZDR))

Warm dense matter (WDM)---an extreme state that is characterized by extreme densities and temperatures---has emerged as one of the most active frontiers in plasma physics and material science. In nature, WDM occurs in astrophysical objects such as giant planet interiors and brown dwarfs. In addition, WDM is highly important for cutting-edge technological applications such as inertial confinement fusion and the discovery of novel materials.

In the laboratory, WDM is studied experimentally in large facilities around the globe, and new techniques have facilitated unprecedented insights into exciting phenomena like the formation of nano diamonds at planetary interior conditions [1]. Yet, the interpretation of these experiments requires a reliable diagnostics based on accurate theoretical modeling, which is a notoriously difficult task [2].

In this talk, I give an overview of recent ground-breaking developments in WDM theory, including its static [3], dynamic [4], and nonlinear [5] properties. Finally, I will present a road map towards a true ab-initio description of WDM.

[1] D. Kraus et al., Nature Astronomy 1, 606-611 (2017)
[2] M. Bonitz et al., Physics of Plasmas 27, 042710 (2020)
[3] T. Dornheim et al., Physics Reports 744, 1-86 (2018)
[4] T. Dornheim et al., Physical Review Letters 121, 255001 (2018)
[5] T. Dornheim et al., Physical Review Letters 125, 085001 (2020)

Der Hybrid-Vortrag ist Teil des Physikalischen Kolloquiums der Sektion Physik der CAU. Alle Interessierten sind herzlich eingeladen: Geiger Lecture Hall (Leibnizstrasse 15), Kiel oder www.physik.uni-kiel.de/de/veranstaltungen/physikalisches-kolloquium

Einladender: Michael Bonitz

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Investigating strong excitations and non-equilibrium in dense matter – HED research at the European XFEL (Dr. Ulf Zastrau, European XFEL)

21.12.2021 ab 16:15

Hybrid, Physikalisches Kolloquium

ZastrauThe advent of X-ray free-electron lasers (XFELs) may prove to be the most profound development since the invention of the laser and, equally, the synchrotron. Sharp improvements in a number of laser parameters, most notably intensity and pulse duration, support this expectation. Indeed, the unprecedented opportunities and expectations have triggered considerable research activities worldwide.

In my talk, I will give an overview of the experimental possibilities at the European XFEL, located in Schenefeld, Schleswig-Holstein. European XFEL currently operates six end-stations for studies with highest spatio-temporal resolution using soft and hard x-rays. The applications range from atomic physics over chemistry and biology to material science and extreme conditions research.

In particular, the intense femtosecond x-ray pulses can resolve ultrafast processes which are not accessible at any other x-ray facility such as synchrotrons. Using available optical lasers, solid samples can be excited by moderate to ultra-relativistic intensities. The subsequent non-equilibrium states, equilibration dynamics within the electronic system and between electrons and lattice can be observed by state of the art x-ray methods.

In particular, the High Energy Density Science (HED) instrument allows international users to investigate a wide range of materials and systems at extreme conditions [1,2]. European XFEL and the HIBEF user consortium [3] form a joint group of more than 30 people for HED research, development and user operation. We offer three optical laser systems, as well as a dedicated platform for research in diamond anvil cells for high pressure science. In the near future, a pulsed magnet for transient studies of superconductivity will be introduced.

The talk will present the specific capabilities and research highlights of the HED instrument [4-6], and in a second part provide an overview of the wider research scope of the entire facility to identify and establish potential collaborations

[1] U. Zastrau, et al., J. Synchrotron Rad. (2021). 28, 1393-1416
[2] K. Appel, et al., Plasma Phys. Control. Fusion 57, 014003 (2015)
[3] www.hibef.de; McMahon and Zastrau, DOI: 10.22003/XFEL.EU-TR-2017-001
[4] A. Descamps et al., Sci Rep 10 (1), 14564 (2020)
[5] H. Hwang et al.; Journal of Physical Chemistry Letters, 2021;
DOI: 10.1021/acs.jpclett.1c00150
[6] H.-P. Liermann et al.; Journal of Synchrotron Radiation, 2021;
DOI: 10.1107/S1600577521002551

Der Hybrid-Vortrag ist Teil des Physikalischen Kolloquiums der Sektion Physik der CAU. Alle Interessierten sind herzlich eingeladen: Geiger Lecture Hall (Leibnizstrasse 15), Kiel oder www.physik.uni-kiel.de/de/veranstaltungen/physikalisches-kolloquium

Einladender: Michael Bonitz

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  • 16:15: Plasma 2020 – The US National Academies Decadal Assessment of Plasma Physics: Overview and Future Research Opportunities (Prof. Dr. Mark J. Kushner, University of Michigan)
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  • 12:00: KiNSIS-Kolloquium: Marco Liserre: Understanding and managing high density energy conversion
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  • 16:00: Enabling the development of novel devices based on silicon microstructures by adding degrees of freedom to metal assisted chemical etching (Enrique Quiroga-González Institute of Physics, BUAP. Puebla, Mexico)
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  • 10:00: KiNSIS Young Academy Day
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  • ganztägig: Nano Summer School für Lehrkräfte am 27. und 28.07.2021
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  • ganztägig: Nano Summer School für Lehrkräfte am 27. und 28.07.2021
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