Nahid Talebi

Nov 27, 2024 | nature.com | Hannah C. Nerl |Nahid Talebi |Christoph Koch

AbstractExcitons are quasiparticles, comprised of an electron excited from the valence band and attracted to the hole left behind, that govern transport properties in transition metal dichalcogenides. Excitonic coherence specifically needs to be understood to realise applications based on Bose-Einstein condensation and superfluidity.

Apr 2, 2024 | nature.com | Nahid Talebi

AbstractScientists have traditionally employed superimposed mutually-coherent electron beams for holography and phase retrieval of electron wavepackets. However, recent theoretical exploration delves into the interaction of superposed electron beams with the matter. This investigation aims to elucidate long-range Coulomb correlations and quantum decoherence phenomena when electrons interact with their environment. Quantum coherence stands as a fundamental aspect of quantum technology1.

Mar 6, 2023 | nature.com | Nahid Talebi

X-ray photons emitted by free electrons travelling in van der Waals materials show energy shifts induced by quantum recoil, thus offering a viable route to generating tailored and tunable single X-ray photons. Moving electrons can emit photons via several mechanisms. The most fundamental ones are Cherenkov radiation1 and Smith–Purcell radiation2. Both phenomena have been intensively studied, for example for transferring orbital angular momentum from an electron beam to emitted photons3.