Pedro M. Echenique

TL;DR: In this article, a theoretical description of the many-body dynamical electronic response of solids is presented, which underlines the existence of various collective electronic excitations at metal surfaces.

TL;DR: The ability to obtain direct time-domain access to charge dynamics with attosecond resolution by probing photoelectron emission from single-crystal tungsten is demonstrated and illustrates thatAttosecond metrology constitutes a powerful tool for exploring not only gas-phase systems, but also fundamental electronic processes occurring on the attose Cond timescale in condensed-matter systems and on surfaces.

TL;DR: In this article, the authors used density functional theory and Monte Carlo method to predict the antiferromagnetic topological insulator (AFMTI) phase, which is hosted by the van der Waals layered compound MnBi$_2$Te$_4$.

TL;DR: In this paper, the spin-orbit interaction leads to a strong splitting of the surface-state bands on low-index surfaces of Bi. The dispersion of the states and the corresponding Fermi surfaces are profoundly modified in the whole surface Brillouin zone.

TL;DR: MnBi_{2}Te_{4} is the first stoichiometric material predicted to realize the zero plateau quantum anomalous Hall state intrinsically and has been theoretically shown to host the exotic axion insulator phase.