Phys. Rev. Lett. 88, 075508 (2002) [4 pages]Localized Metallic Conductivity and Self-Healing during Thermal Reduction of SrTiO3Received 25 June 2001; published 1 February 2002 The occurrence of metallic conductivity in SrTiO3 single crystals is reported for reduction under low partial pressure of oxygen at 800°C. This transition is shown to result from the formation of a high concentration of vacancy defects along a network of extended defects within the skin region. A self-healing phenomenon is observed for progressive reduction which causes the concentration of initially introduced defects to decrease in the course of heat treatment and leads to a breakdown of the metallic conductivity as well as a substantial loss of optical subgap absorption. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.075508
DOI:
10.1103/PhysRevLett.88.075508
PACS:
61.72.-y, 66.30.-h, 71.30.+h, 78.68.+m
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.