Unveiling Excitonic Insulator Signatures in Ta${}_2$NiSe${}_5$

Nour Maraytta, Peter Nagel, Fatemeh Ghorbani +10

The high-temperature phase of Ta${}_2$NiSe${}_5$, a near-zero-gap semiconductor ($E_G$ = 0), is a promising candidate for an excitonic insulator. Given the dome-like…