"Actinide Topological Insulator Materials with Strong Interaction"

Xiao Zhang: Haijun Zhang, Jing Wang, Claudia Felser, Shoucheng Zhang; Science, 03/23/12.

Additional Authors: Haijun Zhang, Jing Wang, Claudia Felser, Shoucheng Zhang

Abstract:

Topological band insulators have recently been discovered in spin-orbit coupled two-and three-dimensional systems. We theoretically predict a class of topological insulators where interaction effects play a dominant role. In actinide elements, simple rocksalt compounds formed by Pu and Am lie on the boundary between metals and insulators. We show that interaction drives a quantum phase transition to a topological insulator phase with a single Dirac cone on the surface. These putative topological insulators may provide a setting for both applied and fundamental investigation.