Transport Phenomena of Cu-S-Te Chalcogenide Nanocomposites: Frequency Response and AC Conductivity
In this communication, development and electrical characterization of some chalcogenide nanocomposites have been reported. X-ray diffraction (XRD) has been studied to reveal microstructure of them. Mott’s variation range hopping model has been used to interpret DC conductivity data at lower temperature. DC conductivity data at higher temperature has been well explained using Greave’s model. To explain AC conductivity data, Meyer-Neldel (MN) conduction rule has been employed. The AC conductivity spectra at different temperatures have been analyzed using Almond-West Formulism. Different conduction models like correlated barrier hopping (CBH) and modified non overlapping small polaron tunneling (NSPT) have been used to interpret its conduction mechanism. Scaling of AC conductivity spectra exhibit that the electrical relaxation process is independent of temperature but it depends on composition. The conductivity mechanism is explained using a schematic structural model.