Electrostatic charge accumulation versus electrochemical doping in SrTiO3 electric double layer transistors

K. Ueno, H. Shimotani, Y. Iwasa, M. Kawasaki

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71 Citations (Scopus)


In electric double layer transistors with SrTiO3 single crystals, we found distinct differences between electrostatic charge accumulation and electrochemical reaction depending on bias voltages. In contrast to the reversible electrostatic process below 3.7 V with a maximum sheet charge carrier density, nS, of 1014 cm-2, the electrochemical process causes persistent conduction even after removal of the gate bias above 3.75 V. nS reached 1015 cm -2 at 5 V, and the electron mobility at 2 K was as large as 10 4 cm2 /V s. This persistent conduction originates from defect formation within a few micrometers depth of SrTiO3.

Original languageEnglish
Article number252107
JournalApplied Physics Letters
Issue number25
Publication statusPublished - 2010 Jun 21
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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