Random conductivity of δ-Bi2O3 films

Skorodumova, N. V.; Jonsson, A. K.; Herranen, M.; Strømme, M.; Niklasson, G. A.; Johansson, B.; Simak, S. I.
June 2005
Applied Physics Letters;6/13/2005, Vol. 86 Issue 24, p241910
Academic Journal
The experimental investigation of the cubic δ-Bi2O3 phase grown on a (110) Au substrate at low temperature has disclosed a chaotic character of the conductivity at low voltage and temperature. Based on first-principles calculations, we show that the conductivity of this oxide strongly depends on the distribution of oxygen ions and that oxygen migration is able to cause a momentary switch of the conduction mechanism.


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