Kim and Moon said. "In contrast to the common belief that charge carriers do not exist at low energy in an insulator, we prove the very existence of charge carriers by measuring the optical ...

Schematic of interfacial charge-transfer (yellow arrows) at the atomic scale in a heterostructure between doped Mott insulator LaTiO3+δ (top) and negative charge-transfer metal LaNiO3 (bottom).

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. It’s often one of the earliest science facts learned in grade ...