Doping-controlled transition from excitonic insulator to semimetal in Ta${}_2$NiSe${}_5$

L. Chen, T. T. Han, C. Cai +4

Excitonic insulator (EI) is an intriguing insulating phase of matter, where electrons and holes are bonded into pairs, so called excitons, and form a phase-coherent state via Bose-…