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April 2023

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3 Seminarium Fotofizyki i Spektroskopii Molekularnej Photoinduced long-distance hydrogen-atom transfer in molecules with 7-hydroxyquinoline frame and carbaldehyde, aldoxime or Schiff base groups as intramolecular hydrogen-atom-transporting cranes 11:00 Instytut Fizyki PAN, Warszawa The photochemical properties of monomeric 7-hydroxyquinoline substituted at position 8 with carbaldehyde or aldoxime groups were studied for the molecules isolated in solid Ar low-temperature matrices (at 10K). It was experimentally demonstrated that upon UV excitation both carbaldehyde and aldoxime groups act as intramolecular cranes transmitting hydrogen atom from the hydroxyl group to the remote nitrogen atom of the quinoline ring. Furthermore, in the case of 7-hydroxyquinoline-8-aldoxime (and its derivatives), the second photochemical channel was activated upon UV (λ > 360 nm) excitation. This process involves syn-anti isomerization by rotation around the double C=N bond in the aldoxime group. Analogous UV-induced processes (long-range hydrogen-atom transfer and syn-anti isomerization) were theoretically predicted to occur in molecules of 7-hydroxyquinoline substituted at position 8 with a Schiff-base group. Journal Club ChatGPT: five priorities for research 12:00 Zoom Pamela Smardz, Instytut Fizyki PAN Date : 03 04 2023	4 Condensed Matter Physics Seminar Transition Metal and Rare Earth ions in compounds – experimentalist point of view 14:00 Institute of Physics P.A.S. Transition metal (TM) and Rare Earth (RE) ions are introduced to various compounds to activate light emission, to compensate defects, generate magnetic properties, etc. For TM ions and II-VI compounds Ludwig-Woodbury model was introduced, which correctly explained spin multiplicity of states. However, several experimental results indicated that this simple model cannot explain optical properties of these ions. For example, it was very puzzling why Cr ion in GaAs is observed in three charge states despite relatively small band gap of this compound. Also energies of different multiplets could not be described by a simple crystal field model. Similar situation was then found for RE ions. Intra-shell transitions of RE ions should be very weak since f-f processes are parity forbidden. It was puzzling how to explain relatively bright emission of RE ions. Link to the lecture Date : 04 04 2023	5 Seminarium z Fizyki Biologicznej i Bioinformatyki Mechanics and rheology of cells and tissues in diseases 15:15 Zoom - Instytut Fizyki PAN, Warszawa Date : 05 04 2023	6	7	8	9
10	11	12 Seminarium z Podstaw Fizyki The Dirac equation and the relativistic world 11:00 Institute of Physics Date : 12 04 2023	13	14	15	16
17 Seminaria okazjonalne Od kondensatu Bosego-Einsteina do sztucznych neuronów 09:30 Audytorium IFPAN, sesja wykładów dla finalistów Olimpiady Fizycznej dr hab. Barbara Piętka, Wydział Fizyki, Uniwersytet Warszawski Seminaria okazjonalne O lepkości i pływaniu w skali mikro 10:45 Audytorium IFPAN, sesja wykładów dla finalistów Olimpiady Fizycznej dr hab. Maciej Lisicki, Wydział Fizyki, Uniwersytet Warszawski Seminaria okazjonalne Badanie antymaterii z atomową precyzją 12:00 Audytorium IFPAN, sesja wykładów dla finalistów Olimpiady Fizycznej dr hab. Tomasz Sowiński, Instytut Fizyki PAN Date : 17 04 2023	18 Theoretical Physics Seminar Investigating the Function of Disulfide Bonds in Proteins with Molecular Dynamics Simulations 12:00 Instytut Fizyki PAN mgr Pamela Smardz, Instytut Fizyki PAN Condensed Matter Physics Seminar Semiconductor optical cavities for photonic signal processing 14:00 Zoom seminar, Institute of Physics P.A.S., Warsaw Neuromorphic photonics offer much faster and energy efficient data processing compared to more matured neuromorphic electronics. I’ll describe a new photonic platform to implement photonic neuromorphic operations. Our optical microcavities in strong light-matter coupling regime serve as building blocks of optical neurons. Light confined in an optical resonator interacting with excitons in optically active material allow to create coupled quasi-particles, exciton-polaritons. Polaritons due to their bosonic nature undergo a transition to non-equilibrium condensate which result in strong laser-like emission from the cavity. This effect occurs at the ps timescale and at single pJ in pulse energy, making this system ideal to implement fast and energy efficient photonic data processing. In our realization of photonic neuron we use the time-coded series of input pulses to code the input information and time-delayed effects to assure the non-linear signal processing. We provide arguments that two Seminaria okazjonalne Recent advances in Atom Probe Tomography (APT) 15:15 Room 203, building I dr Peter H. Clifton, Cameca Date : 18 04 2023	19 Seminarium z Magnetyzmu i Nadprzewodnictwa Semicoductors and topological materials 10:00 Zoom - Institute of Physics PAS prof. dr hab. Tomasz Story; Institute of Physics PAS, MagTop Seminarium z Podstaw Fizyki Introduction to QFT part I 11:00 Institute of Physics P.A.S., Zoom seminar Fundamentals of physics seminar (PhD Students seminar) Seminarium z Fizyki Biologicznej i Bioinformatyki A computational microscope to study co-translational protein folding 15:15 Zoom - Instytut Fizyki PAN, Warszawa dr Tomasz Włodarski, Department of Structural and Molecular Biology, University College London, UK Date : 19 04 2023	20 Seminaria okazjonalne Seminarium Finałowe kończące XVIII edycję konkursu prac uczniowskich Fizyczne Ścieżki Narodowe Centrum Badań Jądrowych w Otwocku W czwartek i piątek, 20 oraz 21 kwietnia 2023 r., odbędzie się Seminarium Finałowe kończące XVIII edycję konkursu prac uczniowskich Fizyczne Ścieżki organizowanego wspólnie przez Narodowe Centrum Badań Jądrowych w Świerku i Instytut Fizyki Polskiej Akademii Nauk w Warszawie. Konkurs odbywa się pod honorowym patronatem Ministra Edukacji i Nauki. W tym roku na Konkurs zgłoszono 83 prace w trzech kategoriach: praca naukowa (18 prac), pokaz zjawiska fizycznego (27 prac), esej (38 prac). Spośród nich jury Konkursu wybrało najciekawsze, będą one prezentowane przez uczniów na Seminarium Finałowym w Świerku. Po krótkiej prezentacji odbywa się dyskusja, w trakcie której uczniowie odpowiadają na pytania jurorów. Oceniana jest sama praca, jak i przebieg dyskusji – ocena tych dwóch elementów decyduje o ostatecznej klasyfikacji. Autorzy najlepszych prac dostają nagrody rzeczowe, których fundatorem jest Urząd Marszałka Województwa iMazowieckiego. Uczniowie klas maturalnych otrzymują indeksy na Wydziały Fizyki Date : 20 04 2023	21 Seminaria okazjonalne Seminarium Finałowe kończące XVIII edycję konkursu prac uczniowskich Fizyczne Ścieżki Narodowe Centrum Badań Jądrowych w Otwocku W czwartek i piątek, 20 oraz 21 kwietnia 2023 r., odbędzie się Seminarium Finałowe kończące XVIII edycję konkursu prac uczniowskich Fizyczne Ścieżki organizowanego wspólnie przez Narodowe Centrum Badań Jądrowych w Świerku i Instytut Fizyki Polskiej Akademii Nauk w Warszawie. Konkurs odbywa się pod honorowym patronatem Ministra Edukacji i Nauki. W tym roku na Konkurs zgłoszono 83 prace w trzech kategoriach: praca naukowa (18 prac), pokaz zjawiska fizycznego (27 prac), esej (38 prac). Spośród nich jury Konkursu wybrało najciekawsze, będą one prezentowane przez uczniów na Seminarium Finałowym w Świerku. Po krótkiej prezentacji odbywa się dyskusja, w trakcie której uczniowie odpowiadają na pytania jurorów. Oceniana jest sama praca, jak i przebieg dyskusji – ocena tych dwóch elementów decyduje o ostatecznej klasyfikacji. Autorzy najlepszych prac dostają nagrody rzeczowe, których fundatorem jest Urząd Marszałka Województwa iMazowieckiego. Uczniowie klas maturalnych otrzymują indeksy na Wydziały Fizyki Date : 21 04 2023	22	23
24 Seminarium Fotofizyki i Spektroskopii Molekularnej Triple phosphorescence in compact donor-acceptor dyads 11:00 Instytut Fizyki PAN, Sala D dr hab. Jerzy Karpiuk; Instytut Fizyki PAN Date : 24 04 2023	25 Seminaria okazjonalne Visit of Prof. Juergen Mlynek at IFPAN 09:30 Institute of Physics; Hall 203, Building I Prof. Mlynek is a president of the Falling Walls Foundation and chairs the Advisory Committee of the Flagship EU Program Quant. On that occasion there is an informal symposium, Tuesday, Hall 203, B. I, 9:30-12:30. 9:30 – 9:35 Roman Puźniak, IFPAN Director, Welcome 9:35 – 9:55 Juergen Mlynek, Message on the Falling Walls Foundation and European Quantum Technology Flagship 9:55 – 10:15 Tomasz Dietl, MagTop as an International Research Agenda: Excellence, internationalization 10:15 – 10:35 Mircea Trif, New qubits in superconductors coffee break 10:35- 10:50 lab tour 10:50 – 11:25 Tomasz Wojtowicz 11:25 - 11:45 Valentine Volobuev, Quantum structures of topological crystalline insulators 11:45 - 12:00 Łukasz Cywiński, QuantEra’s SiQuBus: Si-qubits 12:00 - 12:15 Emilia Witkowska, QuantEra’s MAQS: Magnetic-Atom Quantum Simulator 12:15 - 12:30 Michał Matuszewski, QuantEra’s InterPol: Polariton lattices: a solid-state platform for quantum simulations of correlated and topological states All interested in are invited. Condensed Matter Physics Seminar Geometry-induced spin-filtering in photoemission maps from WTe2 surface states Cancelled 14:00 We demonstrate that an important quantum material WTe2 exhibits a new type of geometry-induced spin-filtering effect in photoemission [1], stemming from low symmetry that is responsible for its exotic transport properties. Through the laser-driven spin-polarized angle-resolved photoemission Fermi surface mapping, we showcase highly asymmetric spin textures of electrons photoemitted from the surface states of WTe2. Such asymmetries are not present in the initial state spin textures, which are bound by the time-reversal and crystal lattice mirror plane symmetries. The findings are reproduced qualitatively by theoretical modeling within the one-step model photoemission formalism. The effect could be understood within the free-electron final state model as an interference due to emission from different atomic sites. The observed effect is a manifestation of time-reversal symmetry breaking by the photoemission process. As such, it cannot be eliminated, but only its magnitude influenced, by special experimental Konwersatorium Developments in computer modelling of inorganic materials 15:15 Zoom - Instytut Fizyki PAN, Warszawa Professor Sir Richard Catlow; Department of Chemistry, University College London; School of Chemistry, Cardiff University; UK Catalysis Hub, Research Complex at Harwell, UK Date : 25 04 2023	26 Seminarium z Magnetyzmu i Nadprzewodnictwa Angular and polarisation dependence of 1s2p RIXS in probing magnetic properties of iron oxides 10:00 Zoom - Institute of Physics PAS dr hab. inż. Marcin Sikora, prof. AGH; Academic Center for Materials and Nanotechnology; AGH University of Science and Technology in Kraków Date : 26 04 2023	27	28	29	30

Condensed Matter Physics Seminar

Altermagnetism from a strong-coupling perspective

04-03-2025 14:00 - 15:00

Venue

Hall D and Zoom platform, Insitute of Physics P.A.S.

Telephone

+48221162964

This email address is being protected from spambots. You need JavaScript enabled to view it.

Website

http://www.ifpan.edu.pl

Speaker

Krzysztof Wohlfeld

Affiliation

Faculty of Physics, University of Warsaw

Link

https://zoom.us/j/91201242528?pwd=4meqIvz910KnwoB1ds4BpvZNidg0rC.1

Sala

Sala D Budynek I

Recently, a new form of magnetism has been proposed -- so-called altermagnetism. While altermagnetism has mostly been discussed within the itinerant picture, here I would like to provide a brief overview of three important aspects related to altermagnetism in the strong-coupling limit. First, I will discuss why one of the most prominent examples of strong-coupling altermagnetism is difficult to observe in real materials [1]. Next, I will explore whether there is a way to observe altermagnetism in strongly correlated copper oxides [2]. Last but not least, I will examine an interesting scenario for detecting altermagnetism in the strongly correlated limit using ARPES [3].

[1] V. Leeb, A. Mook, L. Šmejkal, and J. Knolle; Phys. Rev. Lett. 132, 236701

[2] Y. Li, V. Leeb, K. Wohlfeld, R. Valentí, J. Knolle; arXiv:2412.11922

[3] M. Daghofer, K. Wohlfeld, J. van den Brink (in preparation, 2025).

List of Dates (Page event details)

04-03-2025 14:00 - 15:00

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