Use of the Rigid Band Formalism to Interpret the Relationship between O Chemical Potential and Electron Concentration in La1-xSrxCoO3-δ

Lankhorst, Martijn H.R. and Bouwmeester, H.J.M. and Verweij, H. (1996) Use of the Rigid Band Formalism to Interpret the Relationship between O Chemical Potential and Electron Concentration in La1-xSrxCoO3-δ. Physical Review Letters, 77 (14). pp. 2989-2992. ISSN 0031-9007

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Abstract:	The equilibrium oxygen chemical potential of mixed oxygen ion and electron conducting perovskites La1-xSrxCoO3-δ was measured as a function of δ and x by high temperature oxygen coulometric titration. An almost linear decrease in the chemical potential is observed with increasing net electron concentration. The observed behavior is interpreted to reflect the corresponding change in the Fermi level upon gradually filling up states in a broad electron band with electrons induced by vacancy formation and Sr doping. Assuming a rigid band formalism, an apparent density of states at the Fermi level was calculated, the value of which is in good agreement with that obtained from XPS.
Item Type:	Article
Copyright:	© 1996 The American Physical Society
Faculty:	Science and Technology (TNW)
Research Group:	Inorganic Membranes (IM)
Link to this item:	http://purl.utwente.nl/publications/61211
Official URL:	http://dx.doi.org/10.1103/PhysRevLett.77.2989
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Metis ID: 106538