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Band offsets of wide-band-gap oxides and implications for future electronic devices

Robertson, John·2000·Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena

Abstract

Wide-band-gap oxides such as SrTiO3 are shown to be critical tests of theories of Schottky barrier heights based on metal-induced gap states and charge neutrality levels. This theory is reviewed and used to calculate the Schottky barrier heights and band offsets for many important high dielectric constant oxides on Pt and Si. Good agreement with experiment is found for barrier heights. The band offsets for electrons on Si are found to be small for many key oxides such as SrTiO3 and Ta2O5 which limit their utility as gate oxides in future silicon field effect transistors. The calculations are extended to screen other proposed oxides such as BaZrO3. ZrO2, HfO2, La2O3, Y2O3, HfSiO4, and ZrSiO4. Predictions are also given for barrier heights of the ferroelectric oxides Pb1−xZrxTiO3 and SrBi2Ta2O9 which are used in nonvolatile memories.

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Metadata

Authors
Robertson, J.
Venue
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena
Published
2000-05-01
Volume
18
Issue
3
Pages
1785-1791
ISSN
  • 1071-1023 (ISSN-L)
  • 1520-8567
OpenAlex
W2019017977
Cited by
2,049
References
25
FWCI
90.95
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Band offsets of wide-band-gap oxides and implications for future electronic devices. https://app.cochat.ai/papers/10.1116/1.591472
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Robertson, J. (2000). Band offsets of wide-band-gap oxides and implications for future electronic devices. Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena. https://doi.org/10.1116/1.591472

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