Skip to main content Accessibility help

In-Situ Caiciss Study Of Dynamic Process Of Oxygen Desorption On TiO2-Terminated SrTiO3(001) Surface

  • T. Nishihara (a1), O. Ishiyama (a1), S. Hayashi (a1), M. Shinohara (a1), M. Yoshimoto (a2), T. Ohnishi (a2) and H. Koinuma (a2)...


The topmost atoms of TiO2 - terminated SrTiO3(001) annealed at temperatures between room temperature and 800°C in ultra high vacuum (UHV), have been studied by means of in-situ coaxial impact collision ion scattering spectroscopy (CAICISS). Both time-of-flight spectra at the incident angle of 45.0°C along [ 100] azimuth and of 35.3°C along [110] azimuth revealed Ti and weak O peaks and no Sr peak at 150°C, which means that the topmost layer at 150°C is terminated by TiCh-plane, completely. On the other hand, as increasing the substrate temperature, Sr peak began to appear above 400°C. This Sr peak intensity from both directions was drastically increased with elevating the substrate temperature. This indicates that the topmost O and Ti atoms desorb from the surface at the higher substrate temperature. The ratio Sr/Ti corresponds to the amount of the topmost oxygen or titanium vacancies due to the desorption. It was found that 40 % of the topmost oxygen atoms and 32% of the topmost titanium atoms desorb from TiO2-terminated SrTiO3(001) surface at 800°C. The activation energies for oxygen and titanium desorption were 0.28eV and 0.40eV, respectively.



Hide All
Raiker, G. N., Muryn, C. A., Hardman, P. J., Wincott, P. L., Thornton, G., Bullet, D. W. and Dale, P., J. Phys. Condensed Matter 3, S357 (1991)
Agrawal, V., Chandrasekher, N., Zhang, Y. J., Achutharaman, V. S., Mecartney, M. L. and Goldman, A. M., J. Vac. Sci. Technol. A10, 34 (1992)
Cord, B. and Courths, R., Surf. Sci. 162, 34 (1985)
Katayama, M., Nomura, E., Kanekawa, N., Soejima, H. and Aono, M., Nucl. Instr. and Meth. B33, 857 (1988)
Yoshimoto, M., Maeda, T., Shimozono, K., Koinuma, H., Shinohara, M., Ishiyama, O. and Ontani, F., Appl. Phys. Lett. 65, 3197 (1994)
Nishihara, T., Shinohara, M., Ishiyama, O., Ohtani, F., Yoshimoto, M., Maeda, T. and Koinuma, H., J. Elee. Mat. 25, 667 (1996)
Ishiyama, O., Nishihara, T., Shinohara, M., Ohtani, F., Nishino, S. and Saraie, J., to be published Appl. Phys. Lett. 70(1997)
Kawasaki, M., Takahashi, K., Maeda, T., Tsuchiya, R., Shinohara, M., Ishiyama, O., Yonezawa, T., Yoshimoto, M. and Koinuma, H., Science 266, 1540 (1994)
Liang, Y. and Bonnell, D. A., Surf. Sci. 285, L510 (1993)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed