Maciej Dendzik

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Van der Waals (vdW) materials host a wide range of quantum phenomena, offering exciting opportunities for both fundamental research and next-generation electronic and optoelectronic technologies. In this presentation, I will highlight our recent efforts to explore vdW systems using angle-resolved photoemission spectroscopy (ARPES) and its advanced extensions, including spin-resolved, time-resolved, and momentum microscopy techniques. These methods enable direct insight into electronic band structure, spin and orbital textures, and ultrafast carrier dynamics.
I will focus on key results in transition metal dichalcogenides, black phosphorus, and cuprate superconductors. In particular, I will present recent time-resolved momentum microscopy experiments at a free-electron laser, revealing the ultrafast dynamics of the excitonic Mott transition in WSe_2. I will also discuss emerging studies of black phosphorus, where optical excitation induces valley-dependent carrier relaxation and drives light-induced transport phenomena analogous to the nonlinear Hall effect occuring on the femtosecond timescale.
Finally, I will briefly highlight our ongoing developments in high-resolution time-resolved ARPES instrumentation at KTH Royal Institute of Technology, along with novel in situ exfoliation methods that enable the preparation of pristine two-dimensional materials under ultra-high vacuum conditions.

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KTH (Royal Institute of Technology of Stockholm)
PH2
Contact: erwann Bocquillon / Matteo Cacco