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Title: Limitations to the room temperature mobility of two- and three-dimensional electron liquids in SrTiO{sub 3}

We analyze and compare the temperature dependence of the electron mobility of two- and three-dimensional electron liquids in SrTiO{sub 3}. 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.
Authors:
; ; ; ; ; ;  [1]
  1. Materials Department, University of California, Santa Barbara, California 93106-5050 (United States)
Publication Date:
OSTI Identifier:
22412610
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CARRIER DENSITY; COMPARATIVE EVALUATIONS; DENSITY; DOPED MATERIALS; ELECTRON MOBILITY; ELECTRONS; PHONONS; STRONTIUM TITANATES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; THREE-DIMENSIONAL LATTICES; TWO-DIMENSIONAL SYSTEMS