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11/05/2026, 09:00
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Peter Švihra11/05/2026, 09:15
This talk reviews the development of 4H-SiC Low Gain Avalanche Detectors as a next step in wide bandgap sensor technology. A central part of the contribution is the development and evaluation of the first segmented LGAD structures produced in 4H-SiC. The presentation will highlight progress on segmentation design, charge-sharing behaviour, and early timing studies, supported by initial TCT and...
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Dr Taj Jankovič (Institute of Physics of the Czech Academy of Sciences)11/05/2026, 09:30
Quasi-periodic eruptions (QPEs) are a recently discovered class of repeating X-ray flares from galactic nuclei hosting supermassive black holes. Their physical origin remains uncertain, but repeated collisions between a star and an accretion disc have emerged as a promising explanation. In this scenario, each disc crossing drives shocks, launches dense outflows, and produces radiation that may...
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Christian Northe (Czech Academy of Sciences)11/05/2026, 09:45
Present theoretical predictions for the entanglement entropy through topological defects are violated in numerical simulations of critical systems. In this talk, I introduce a new formalism for the preparation of reduced density matrices in the presence of topological defects, and emphasize the role of defect networks with which they can be dressed. Grouplike and duality defects are considered...
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Helena Lefebvre (Extreme Light Infrastructure Beamlines)11/05/2026, 10:00
Laser-driven ion accelerators are an emerging technology capable of producing ultra-short, high-intensity particle beams with broad energy spectra, opening new opportunities in physics, materials science, and medical applications. Within this context, the ELIMAIA–ELIMED beamline is designed to transport, shape, and deliver laser-accelerated ion beams with controlled parameters for...
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Patrik Čechvala (Institute of Physics, Czech Academy of Sciences)11/05/2026, 10:15
An important method in gamma-ray astronomy is observation using Imaging Atmospheric Cherenkov Telescopes (IACTs). IACTs are large-diameter, ground-based reflective telescopes equipped with sensitive cameras. The telescopes detect the faint flashes of Cherenkov light emitted during the development of extensive air showers, which are initiated by high-energy cosmic gamma-ray photons interacting...
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William Barker (FZU)11/05/2026, 10:45
Particle dark matter, along with many ultraviolet scenarios, suggest that additional low-energy degrees of freedom remain to be discovered. Theories of new physics may be understood as statistical models, for which the Lagrangian couplings are model parameters. The net worth of a theory is determined by its Bayesian evidence: the likelihood of precision cosmology data is multiplied by the...
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Sitender Kashyap11/05/2026, 11:00
Scattering amplitudes in string theory describe how strings interact, but even the simplest cases can be subtle in modern formulations. In this talk, I will revisit the two-point function for closed strings in the pure spinor approach, where a naïve extension of open-string methods fails.
We will show how this issue can be resolved by carefully implementing BRST symmetry, leading to a...
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Souvik Priyam Adhya11/05/2026, 11:15
Probing the earliest stages of high-energy collisions is essential for understanding the formation and evolution of strongly interacting matter. In this work, we investigate initial-state effects in relativistic collider environments through the interplay of parton energy loss (quenching) and diffraction. These results offer a novel pathway to constrain parton densities, saturation phenomena,...
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Prasanth Asokan (Division of Optics)12/05/2026, 10:00
In response to growing environmental concerns, there is a need for accurate and efficient methods to detect water pollutants. This research focuses on developing an advanced microchannel-based Surface-Enhanced Raman Spectroscopy (SERS) substrate. This innovative platform aims to identify various water contaminants, including pharmaceutical residues like diclofenac, caffeine, and carbamazepine....
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Himanshu Kumar (HiLASE Centre, Institute of Physics of the Czech Academy of Sciences Dolní Břežany, Czech Republic)12/05/2026, 10:20
A cost-effective, Co-free Fe-based medium entropy alloy (MEA), was developed to achieve an exceptional combination of strength and ductility at both room and cryogenic temperatures. The Co-free design is strategically motivated by the high cost, supply risk, and density associated with Co-containing alloys, making the present system more economically and industrially viable without...
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Dr Girum A. Beyene (FZU - INSTITUTE OF PHYSICS OF THE CZECH ACADEMY OF SCIENCES)12/05/2026, 10:40
Laser-produced plasmas (LPPs) are widely used as light sources for laser-induced breakdown spectroscopy (LIBS) and for nanoparticle generation. The optical emission properties of LPPs are strongly governed by early laser–plasma interaction dynamics. In this study, advanced laser beam shaping was employed to control plasma formation and emission during laser ablation of metallic and...
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Shahab Ahmed Abbasi (FZU – Institute of Physics of the Czech Academy of Sciences)12/05/2026, 11:00
Transparent p–n junctions are essential for the next advancement in transparent electronics (displays, sensors, or solar cells). The challenges arise from the lack of high-quality p-type transparent conducting oxides. A promising candidate is CuCrO2, a wide-bandgap delafossite, which offers both p-type conductivity and strong transparency.
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In this P4F project, pulsed laser deposition (PLD)... -
Rémi Bérard (FZU)12/05/2026, 11:20
Due to their size ranging from one nanometre to a few hundred nanometres, nanoparticles exhibit a high surface-to-volume ratio and specific light-matter interactions (plasmon effect) that benefit applications such as catalysis, optics, and medicine. Chemical synthesis methods dominate the market due to their strong reproducibility and tunable properties. However, these methods are highly...
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Xiao Li (Division of Optics, Department of Low-Temperature Plasma)12/05/2026, 11:40
To regulate reactive HiPIMS processes of vanadium oxides, plasma diagnostics based on the RF Sobolewski probe theory has been carried out. In addition to the typical approach of using a probe inserted into the chamber at the substrate side, a novel non-invasive approach using the target as an in-situ probe has also been developed. The RF Sobolewski probe method enables the measurements of ion...
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Daniel Tchoń (Institute of Physics of the Czech Academy of Sciences)13/05/2026, 09:00
TEM-based Electron Diffraction (ED) has progressed from sample orientation or phase analysis to a reliable method for ab initio crystal structure determination at the nanoscale. Owing to the high interaction strength, the practical limits of ED applicability continue to be explored, but its limitations are apparent: only a finite dose budget can be spent on collecting diffraction patterns from...
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Michal Varga13/05/2026, 09:15Division of Condensed Matter PhysicsTalk
This project builds a comprehensive understanding of Ni-Fe-Ga Heusler nanowires. These materials provide the means for transfer of the shape memory and magnetocaloric properties of Heusler alloys towards nanoscale. A single-step synthesis developed during the project and immediate functionality make the nanowires a suitable material in the field of microelectronics, cell-oriented biomedicine...
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Miina Leiviskä13/05/2026, 09:30Division of Condensed Matter PhysicsTalk
Magnonics — the study of spin waves — is a promising field for developing energy-efficient future information technologies. In this project, we explored magnon transport in altermagnetic materials, a novel class of collinear and compensated magnetic systems with unique spin symmetries that allow for many useful spintronic phenomena.
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Our experiments confirmed the transfer of spin current... -
Karol Kawa13/05/2026, 09:45Division of Condensed Matter PhysicsTalk
Environmental interactions are usually associated with decoherence and the loss of quantum information. However, they also play an essential role in the measurement, control, and stabilisation of quantum devices. We theoretically investigate this dual role in two open quantum systems.
The first system is a singlet–triplet qubit in a double quantum dot monitored by a quantum point contact....
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Dr Karol Bartosiewicz (Institute of Physics of the Czech Academy of Sciences)13/05/2026, 10:00
Atomic size mismatch in oxide crystals has long been treated as a barrier, linked to phase instability, dopant segregation, and uncontrolled defect formation during melt growth. This project overturns that limitation by establishing ionic size mismatch and melt nonstoichiometry as controllable variables that define phase structure and functional properties in rare-earth aluminate high-entropy...
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Jahangeer Khan (Thin Film and Nanostructures Department, FZU)13/05/2026, 10:15
All-inorganic cesium lead iodide (CsPbI₃) perovskite quantum dots (PQDs) have emerged as promising candidates for next-generation photovoltaic and optoelectronic applications owing to their optoelectronic properties and solution processability.
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However, the dynamic binding of intrinsic ligands (OA and OAm) to the PQD surface is easily disrupted in the polar environment of the purification... -
Sumit Ghosh13/05/2026, 11:00Division of Condensed Matter PhysicsTalk
Magnetic textures have recently attracted significant theoretical and experimental interest due to their rich and complex physical properties, making them potential candidates for new computational devices. Their feasibility as a data processing unit has also recently been demonstrated. However, the current developments in this regard are confined to a very small number of magnetic textures....
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Indranil Mal (FZU)13/05/2026, 11:15Division of Condensed Matter PhysicsTalk
GridFF, an efficient method for simulating molecules on rigid substrates. The approach is inspired by techniques from techniques used in protein–ligand docking in biochemistry. By projecting molecule–substrate interactions onto precomputed spatial grids with tricubic B-spline interpolation, GridFF reduces the computational cost by orders of magnitude compared to traditional pairwise atomistic...
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Dr Shatabda Bhattacharya (FZU)13/05/2026, 11:30Division of Condensed Matter PhysicsTalk
Despite demonstrating bistability, the absence of long-range magnetic order and poor electrical conductivity in spin-crossover (SCO) materials limit their prospects in spintronics. Here, we report easily processable Fe-based SCO nanostructures specifically [Fe(Htrz)2(trz)]BF4 grown on 2D reduced graphene oxide (rGO). X-ray photoelectron spectroscopy (XPS) reveals a new bonding state and...
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Somnath Dey (Electron Crystallography Group, Structural Analysis Department, Solid State Physics Section, FZU)13/05/2026, 11:45
Molecular crystals with macroscopic flexibility have shown tremendous potential for applications as flexible optical waveguides, fluorescent materials, piezo- and ferroelectrics, semiconductors and drug tablets in the last decade.[1 and references therein] μ-X-ray diffraction technique employing synchrotron radiation has been used to understand the underlying mechanisms of deformation.[2]...
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Kunal Tiwari (Department of Dielectrics, FZU Na Slovance)13/05/2026, 12:00Division of Condensed Matter PhysicsTalk
Probing charge carrier dynamics across a broad frequency range — from terahertz (THz) to infrared (IR) regimes — presents a powerful, contact-free procedure to investigate nanoscale transport phenomena in low-dimensional materials. Combining frequency dependent optical conductivity spectra with conventional d.c. electrical measurements enable a comprehensive picture of carrier transport...
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Dr Ranjithkumar Raju (Institute of Physics of the Czech Academy of Science)13/05/2026, 12:15
Porous carbon materials are widely recognized as promising electrode candidates for supercapacitors due to their high specific surface area and tunable pore architecture, which facilitate efficient ion adsorption and enhance electric double-layer capacitance (EDLC). Furthermore, heteroatom doping, particularly nitrogen incorporation, can introduce additional pseudocapacitive contributions via...
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Erick Munive Villa (CEICO - FZU, Institute of Physics of the Czech Academy of Sciences)
We investigate the multiscale structure and dynamics of ultralight dark matter (ULDM) using a combination of spectral numerical methods and adaptive large-scale simulations within the Schrödinger–Poisson (SP) framework and its extensions. At small scales, we employ Fourier-based time-splitting techniques to resolve interference-driven dynamics and solitonic structure formation in scalar field...
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