Ultrafast melting and recovery of collective order in the excitonic insulator Ta${}_2$NiSe${}_5$

Hope M. Bretscher, Paolo Andrich, Prachi Telang +4

The layered chalcogenide Ta${}_2$NiSe${}_5$ has been proposed to host an excitonic condensate in its ground state, a phase that could offer a unique platform to study and manipulat…