Anomalous CDW ground state in Cu${}_2$Se: a wave-like fluctuation of $dc$ I-V curve near 50 K

Mengliang Yao, Weishu Liu, Xiang Chen +4

A charge density wave (CDW) ground state is observed in polycrystalline Cu${}_2$Se below 125 K, which corresponds to an energy gap of 40.9 meV and an electron-phonon coupling constan…