The insulator to correlated metal phase transition in molybdenum oxides

作者：Smith G B^*; Golestan D; Gentle A R

来源：Applied Physics Letters, 2013, 103(5): 051119.

DOI：10.1063/1.4817588

In sub-stoichiometric MoO3, electrical and optical responses across the solar spectrum are tunable and manifest a sharp phase transition in thin films at a specific oxygen content. Models of optical response in insulating and conducting regimes have been developed. Oxygen vacancies induce semiconducting response exactly proportional to the observed concentration of gap d-states until the transition. Ionization potential is thus tunable. Metallic thin films are never plasmonic at any stoichiometry and their conductivity, Hall mobility, carrier density, and plasma frequency are consistent, but either loss rate or effective mass mean metallic conduction is correlated rather than classical.

• 出版日期2013-7-29