Aller au contenu directement

Carrier Density Control of the SrTiO3 (001) surface 2DEG

Published on May 22, 2015

The origin of the two-dimensional electron gas (2DEG) stabilized at the bare surface of SrTiO3 (001) is investigated. Using high-resolution angle resolved photoemission and core level spectroscopy we show conclusively that this 2DEG arises from light-induced oxygen vacancies. We identify the dominant mechanism driving vacancy formation allowing unprecedented control over the 2DEG carrier density.


Siobhan McKeown Walker, Flavio Yair Bruno, Zhiming Wang, Alberto de la Torre, Sara Riccó, Anna Tamai, Timur K. Kim, Moritz Hoesch, Ming Shi, Mohammad Saeed Bahramy

See this publication on UNIGE