Conveners
Solid State Physics
- Luc Patthey (PSI - Paul Scherrer Institut)
Solid State Physics
- Simon Gerber (PSI - Paul Scherrer Institut)
Solid State Physics
- There are no conveners in this block
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Steven Johnson (PSI - Paul Scherrer Institut)21/09/2026, 08:30Tutorial
The short wavelength and high photon energy of x-rays offers unique opportunities to selectively probe coherent dynamics in solids. In this talk I will give a brief overview of how x-ray diffraction and absorption spectroscopy can, in combination with selective pump pulses ranging from THz to UV, identify coherent spin and lattice dynamics on different length scales. I will present as an...
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Giacomo Ghiringhelli (Politecnico di Milano)21/09/2026, 09:10Invited
Resonant inelastic x-ray scattering (RIXS) is a premier tool for the investigation of quantum materials with strong electronic correlation. It is used to study high-energy spin excitations, charge transfer and orbital excitations, charge order and its associated fluctuations, electron-phonon coupling and hybrid modes among the listed ones. At synchrotron x-ray sources, high resolution RIXS has...
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Wei-Sheng Lee (SLAC National Accelerator Lab.)21/09/2026, 09:35Invited
Unravelling the response of microscopic degrees of freedom in photoexcited cuprates is a central challenge in ultrafast materials science. While the charge response has been extensively investigated via time-resolved (tr-) optical spectroscopy and tr-ARPES, the nonequilibrium dynamics of magnetic degrees of freedom remain largely unexplored due to the lack of a direct probe. The advent of...
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Zeinab Ebrahimpour (Elettra Sincrotrone Trieste S.C.p.A.)21/09/2026, 10:00Solid State PhysicsOral
Silicon undergoes a sub-picosecond non-thermal melting transition when excited by intense femtosecond laser pulses. This talk demonstrates how soft X-ray absorption spectroscopy (XAS), performed at the seeded FERMI free-electron laser (FEL), effectively captures this process by resolving the ultrafast electronic structure dynamics of silicon with a temporal resolution on the 10 fs...
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Jakub Vonka (PSI - Paul Scherrer Institut)21/09/2026, 10:15Quantum ScienceOral
Diffraction-before-destruction schemes rely on collecting data before radiation damage develops. This condition is readily satisfied for atomic motion, making serial femtosecond crystallography highly successful in investigating photoinduced structural changes in both organic and inorganic matter. It is less clear, however, whether the condition also holds for the electronic contributions to...
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Roman Mankowsky (PSI - Paul Scherrer Institut)22/09/2026, 14:00Invited
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Tommaso Venanzi (TU Dresden)22/09/2026, 14:25Invited
Coulomb-bound quasiparticles, such as excitons and trions in transition metal dichalcogenide monolayers, feature high binding energies on the order of 100s of meV, exhibit strong light-matter coupling, and can store quantum information in spin-valley degrees of freedom. Realizing strategies for external control of the excitonic states on ultrafast timescales thus emerged as an important avenue...
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Nidhi Adhlakha (Assistant Professor, National Institute of Technology Karnataka, Surathkal -575025)22/09/2026, 14:50Solid State PhysicsOral
Black Phosphorous (BP) represents a very unique two dimensional (2D) material due to its tunable infrared band gap and its anisotropic conduction properties. It has been emerged as an attractive material with a huge potential for future nanoelectronics and nanophotonic applications [1]. BP also shows the optical signatures of pressure induced Lifshitz transition from a semiconductor to a Dirac...
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Dorothee Mader (Fritz-Haber-Institut der Max-Planck-Gesellschaft)22/09/2026, 15:05Solid State PhysicsOral
In this talk infrared-visible sum-frequency generation (SFG) spectro-microscopy using the FHI-FEL is introduced. This method combines benefits from second harmonic generation imaging such as local information on structural symmetry and benefits from sum-frequency generation spectroscopy such as details of the atomic structure and bonding via vibrational resonances.
We demonstrate an...
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Naman Agarwal (FERMI FEL, Elettra Sincrotrone Trieste, Trieste, Italy)22/09/2026, 15:20Solid State PhysicsOral
Nanoscale ultrafast all-optical tuning of magneto-acoustic devices is of significant scientific and technological interest, particularly in areas of energy efficient data storage and information processing. Ultrafast generation and control of high frequency nanoscale surface acoustic waves (SAWs) in the first order magneto structural phase transitions can be used to precisely control such...
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Angel Rodriguez Fernandez (Diamond Light Source Ltd.)22/09/2026, 15:35Solid State PhysicsInvited
Material processing with femtosecond lasers has attracted enormous interest over the past decades due to the countless potential applications in technology and industry. One key aspect of their performance is the reduced thermal load, enabling the fabrication of smaller and sharper feature sizes, as well as enabling surface and sub-surface processing of transparent materials. This advantage...
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Alexander Paarmann (Fritz-Haber-Institut der Max-Planck-Gesellschaft)22/09/2026, 16:30Invited
Phonon polaritons are hybrid light-matter quasiparticles in polar crystals that enable waveguiding of light on length scales much smaller than the photon wavelength [1]. Here, we introduce the hafnium dichalcogenides HfS2 and HfSe2 as new van der Waals materials that supports phonon polaritons in the terahertz (THz) spectral range. Using THz near-field optical microscopy coupled to the...
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Dr Omkar Rambadey (Max Planck Institute for the Structure and Dynamics of Matter)22/09/2026, 16:55Solid State PhysicsOral
The melting of metallic nanoparticles under optical excitation has been one of the puzzling processes, wherein photoexcited electrons deposit their energy into the lattice via electron-phonon coupling on sub-picosecond time scales and consequent phonon dynamics takes over. While previous attempts [1,2] on gold nanoparticles have elucidated the electronic dynamics and the shape transformations,...
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Karina Kazarian (PSI - Paul Scherrer Institut)22/09/2026, 17:10Quantum ScienceInvited
We present the status and capabilities of the pulsed magnetic field setup that is currently being comissioned at the Cristallina-Quantum experimental station of the Aramis hard X-ray beamline branch at SwissFEL. The setup is based on a split-pair coil magnet, providing a vertical magnetic field with wide horizontal scattering angle access and compatible with cryogenic sample environments. The...
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Rasmus Buchin (CFEL/UHH)22/09/2026, 17:35AMO PhysicsOral
Ultrafast and intense X-ray free electron laser (XFEL) pulses can visualize non-equilibrium dynamics on the femtosecond time scale with high spatial resolution at single nanoparticle (NP) level . Single exposure coherent diffraction imaging (CDI) of individual nanospecimen has been so far limited to a few nanometers. The limiting factor is sample bleaching through photo-ionization and...
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Alessandra Milloch22/09/2026, 17:50Solid State PhysicsOral
Thermoelastic properties at the nanoscale play a central role in condensed matter physics and nanostructured materials, yet remain challenging to probe experimentally. Extreme ultraviolet (EUV) transient grating (TG) technique has recently enabled access to these dynamics at selected wavevectors in the tens-of-nanometers range, providing insight into nanoscale thermal transport and acoustic...
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V. N. Strokov (Center of Photon Science, Paul Schererr Institute, Villigen-PSI, Switzerland)22/09/2026, 18:05Solid State PhysicsPoster
We report pilot time-resolved X-ray photoemission spectroscopy (tr-XPS) experiments performed at the SXP (Soft X-ray Photoemission) instrument [1] of the European XFEL. The samples were pumped with 1.5 eV laser pulses at fluences up to 2 mJ/cm⁻² and probed with XFEL pulses of 1 keV with a fluence of ~5 μJ/cm⁻², a temporal resolution of ~60 fs and an energy resolution of ~100 meV. We explored...
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Nicolas Delnour (Physics Department, Centre for the Physics of Materials, McGill University)Nonlinear X-ray scienceOral
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The emergence of extreme-ultraviolet free-electron-laser (EUV FEL) sources has made possible transient grating (TG) spectroscopy at nanometer length scales, enabling studies of nanoscale thermal transport and bulk and surface coherent phonons with nanoscale wavelengths [1]. Here, we report very recent EUV TG measurements... -