Electrical Conduction in Nonstoichiometric α‐Nb2O5

Autor:	D. H. Whitmore, R. F. Janninck
Rok vydání:	1962
Předmět:	Condensed matter physics Chemistry General Physics and Astronomy chemistry.chemical_element Electron Conductivity Oxygen Ion Electrical resistivity and conductivity Excited state Vacancy defect Physical and Theoretical Chemistry Atomic physics Excitation
Zdroj:	The Journal of Chemical Physics. 37:2750-2754
ISSN:	1089-7690 0021-9606
Popis:	The electrical conductivity of nonstoichiometric α‐Nb2O5—x was measured as a function of both the composition over the range 0.001≤x≤0.137 and the temperature from 77° to 1270°K. The temperature dependence of the conductivity of a specimen of fixed oxygen content may be rationalized on the basis of excitation of electrons from donor centers at low temperatures and an exhaustion region at high temperatures. The conductivity data are interpreted in terms of an oxygen ion vacancy defect capable of trapping two electrons which can be thermally excited into a narrow 4d conduction band. Assuming this type of defect, an estimate of the mobility of the electrons in the conduction band is made from the conductivity data in the exhaustion region.
Databáze:	OpenAIRE
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