Electronic transport in molybdenum dioxide thin films
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Molybdenum dioxide (MoO2) is a mixed ionic electronic conductor with potential applications in energy storage and conversion. There is some ambiguity about the nature of the electronic conduction mechanism and its temperature dependence. Conductivity data as a function of temperature were obtained and explained within the framework of the band structure to support the description of MoO2 as a semi-metal. AC Hall effect measurements found low electron mobilities as expected for d band conduction. Collectively the data supported a combined conduction model including residual conductivity, low temperature hopping and impurity band conduction from Mo 4d bands degenerate with the conduction band.
KeywordsMoO2 Mixed Ionic Electronic Conductor Electrostatic Spray Deposition Molybdenum Dioxide Hall Effect Data
Support for this work was provided by the Office of Naval Research (N00014-12-1-0830) and the Department of Energy (DE-FG02-07ER46386).
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