Seminarium Fizyki Ciała Stałego

Van der Waals (vdW) crystals have attracted great interest for the exceptional electronic, optical, chemical, and mechanical properties they reveal in their two-dimensional (2D) form. Furthermore, they are extremely flexible, so that they can sustain unprecedentedly high strains as compared to conventional low-dimensional semiconductors.In this seminar, we show how micro-scale mechanical deformations in 2D crystals represent an ideal platform to study their fundamental properties. More specifically, we exploit the capability of hydrogen-ion irradiation to induce the formation of atomically thin micro/nano-bubbles made of transition metal dichalcogenides (or TMDs, such as MoS2 or WS2) and hexagonal boron nitride. These bubbles both modify the opto-electronical properties of the crystal and represent a unique system to study the mechano-elastic and adhesive properties of vdW crystals and heterostructures. Strain is not only a consequence of the bubble mechanical deformation but we show that it prompts the opportunity to unveil subtle exciton hybridization phenomena in TMD bubbles investigated by Zeeman-splitting spectroscopy. Finally, we present the fabrication of spatially ordered arrays of bubbles operating as single photon sources.UwagaSeminarium w trybie HybrydowymFaculty of Physics room 0.06link to remote mode:https://zoom.us/j/7218838148szczegóły patrz instrukcja :instrukcja: (pdf file)AttentionThe seminar in the Hybrid modeFaculty of Physics room 0.06for details see instruction :