In this talk I will review some of my recent attempts to investigate the role of phonon dynamics and electron-phonon interactions in various novel two-dimensional materials in and out of equilibrium. In the first part of the presentation, I will show our theoretical results on the charge-density-wave (CDW) state in the single layer TiSe₂. The underlying mechanism of the CDW transition is highly controversial, and the proposed scenarios range from purely electron to purely phonon driven. I will show that strong electron-phonon fluctuations lead to drastic modifications of the electronic structure of TiSe₂ near the CDW transition, explaining some of the experimental observations. Further, some novel insights on the light-matter interaction and plasmon dynamics will be given across the CDW phase transition in TiSe₂. I will also discuss the strength of the excitonic effects and its role in the CDW formation. In the second part of my talk, I will outline our efforts to understand the superconductivity in the electron-doped MoS₂, where the T_c – doping phase diagram is characterized with a dome structure. Our results show several interesting structural phase transitions that could explain the unusual behavior of T_c. The third part of the talk will review our studies on electron thermalization and phonon dynamics induced by the laser excitations. Within this part, I will present the numerically tractable methodologies suitable for simulating ultrafast conditions and the corresponding results on nonadiabatic phonon renormalization in the photo-excited MoS₂ and graphene. As a final part of the presentation, I will lay out my future research and funding plans.

Nastupno predavanje će se održati u predavaonici u 1. krilu Instituta za fiziku.