Title :
Oxygen vacancies in SrTiO3
Author :
Euiyoung Choi ; Joho Kim ; Cuong, Doduc ; Jaichan Lee
Author_Institution :
School of Advanced Materials Science and Engineering, Sungkyunkwan University, Kyunggido 440-746, Korea
Abstract :
Oxygen vacancy clustering in SrTiO3-δ thin films has been investigated by electrical transport and photoemission spectroscopy. We deposited SrTiO3-δ thin films on LaAlO3(001) substrate at reducing oxygen ambients. The carrier density did not increase with decreasing the ambient oxygen pressure. Photoemission study shows multi valence state of Ti ion including Ti+2 which localized state. Those results are explained by electron localization via oxygen vacancy clustering.
Keywords :
Atmospheric measurements; Charge carrier density; Density measurement; Distortion measurement; Electrons; Ferroelectric materials; Oxygen; Photoelectricity; Spectroscopy; Transistors;
Conference_Titel :
Applications of Ferroelectrics, 2008. ISAF 2008. 17th IEEE International Symposium on the
Conference_Location :
Santa Re, NM, USA
Print_ISBN :
978-1-4244-2744-4
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2008.4688119
