Archiv 2016

The iridium oxide family of correlated electron systems is predicted to host a variety of exotic electronic phases owing to a unique interplay of strong electron-electron interactions and spin-orbit coupling. There is particular interest in the perovskite iridate Sr₂IrO₄ due to its striking structural and electronic similarities to the parent compound of high-Tc cuprates La₂CuO₄. Recent observations of Fermi arcs with a pseudogap behavior in doped Sr₂IrO₄ and the emergence of a d-wave gap at low temperatures further strengthen their phenomenological parallels. [mehr]

Monolayer transition-metal dichalcogenides such as MoS₂ and WS₂ are prime examples of atomically thin semiconducting crystals that exhibit remarkable electronic properties. They have a pair of valleys that can serve as a new degree of freedom, but these valleys are energetically degenerate, protected by time-reversal symmetry. [mehr]