Journal
APPLIED PHYSICS LETTERS
Volume 106, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4907888
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Funding
- Extreme Electron Concentration Devices (EXEDE) MURI program of the Office of Naval Research (ONR) [N00014-12-1-0976]
- UCSB MRL - MRSEC Program of the U.S. National Science Foundation [DMR-1121053]
- U.S. National Science Foundation through a Graduate Research Fellowship [DGE-1144085]
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We analyze and compare the temperature dependence of the electron mobility of two-and three-dimensional electron liquids in SrTiO3. The contributions of electron-electron scattering must be taken into account to accurately describe the mobility in both cases. For uniformly doped, three-dimensional electron liquids, the room temperature mobility crosses over from longitudinal optical (LO) phonon-scattering-limited to electron-electron-scattering-limited as a function of carrier density. In high-density, two-dimensional electron liquids, LO phonon scattering is completely screened and the mobility is dominated by electron-electron scattering up to room temperature. The possible origins of the observed behavior and the consequences for approaches to improve the mobility are discussed. (C) 2015 AIP Publishing LLC.
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