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Title: Ac conductivity in boron doped amorphous carbon films
Authors: Vishwakarma, P N
Keywords: Disordered systems
Thin films
Electron-electron interactions
Issue Date: Nov-2008
Publisher: Elsevier Ltd.
Citation: Solid State Communications 149 (2009) 115-120
Abstract: Experimental results on frequency and temperature dependence of ac conduction in boron doped amorphous carbon films are analyzed in the framework of available microscopic models. Depending on the response, the conductivity plot is divided into three regimes (low frequency high temperature; moderate frequency intermediate temperature; high frequency low temperature) and the data in the respective regimes are corroborated with the various theoretical models accordingly. The conductivity data at high frequency and low temperature suggests that relaxation via quantum mechanical tunneling might be the dominant conduction mechanism. At intermediate temperatures and moderate frequencies, the conductivity data is in good agreement with extended pair approximation model with interaction correction. Signature of enhanced interaction effect is observed at low temperature.
Description: Copyright for this paper belongs to the Elsevier Ltd.
Appears in Collections:Journal Articles

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