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Effective electron mobility in Si inversion layers in metal–oxide–semiconductor systems with a high-κ insulator: The role of remote phonon scattering
Abstract
The high dielectric constant of insulators currently investigated as alternatives to SiO2 in metal–oxide–semiconductor structures is due to their large ionic polarizability. This is usually accompanied by the presence of soft optical phonons. We show that the long-range dipole field associated with the interface excitations resulting from these modes and from their coupling with surface plasmons, while small in the case of SiO2, for most high-κ materials causes a reduction of the effective electron mobility in the inversion layer of the Si substrate. We study the dispersion of the interfacial coupled phonon-plasmon modes, their electron-scattering strength, and their effect on the electron mobility for Si-gate structures employing films of SiO2, Al2O3, AlN, ZrO2, HfO2, and ZrSiO4 for “SiO2-equivalent” thicknesses ranging from 5 to 0.5 nm.
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Cites
Electronic properties of two-dimensional systems
Ando, T., Fowler, A. B., & Stern, F. (1982) · Reviews of Modern Physics · doi:10.1103/revmodphys.54.437 · Cited by 7,455
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Metadata
- Authors
- Fischetti, M. V., Neumayer, D. A., & Cartier, E. A.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 2001-11-01
- Volume
- 90
- Issue
- 9
- Pages
- 4587-4608
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W2080254265
- Cited by
- 747
- References
- 1
- FWCI
- 36.80
- Type
- journal article
- Language
- en
- Open access
- closed
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- Fischetti, M. V., Neumayer, D. A., & Cartier, E. A. (2001). Effective electron mobility in Si inversion layers in metal–oxide–semiconductor systems with a high-κ insulator: The role of remote phonon scattering. Journal of Applied Physics. https://doi.org/10.1063/1.1405826
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