Unconventional superconductivity in Tantalum sulfide

  Amit Kanigel  
Technion - Israel Institute of Technology

Low dimensional materials have been a major subject of interest in recent years. In particular, the transitions metal dichalcogenides (TMDs). These materials exhibit strong electron-electron and electron-phonon interactions that lead to complicated phase diagrams showing a variety of ground states.

A fascinating frontier, largely unexplored, is the stacking of strongly correlated phases of TMDs. We study 4Hb-TaS2, a structure of TaS2 which naturally realizes an alternating stacking of layers of a Mott insulator and of a superconductor.  We find that the proximity between these two phases results in a superconductor with unusual properties. 

In the talk, I will review the experimental evidence, obtained in collaboration with several other groups, for unconventional superconductivity in 4Hb-TaS2.