The maximal superconductivity in proximity to charge density wave quantum critical point in Cu${}_x$TiSe${}_2$

Tae-Ho Park, Obinna P. Uzoh, Han-Yong Choi

Superconductivity emerges in $1T$-TiSe${}_2$ when its charge density wave (CDW) order is suppressed by Cu intercalation or pressure. Since the CDW state is thought to be an excitonic…