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

Journal Article · Mon Feb 09 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4907888· OSTI ID:22412610

Mikheev, Evgeny; Himmetoglu, Burak; Kajdos, Adam P.; Moetakef, Pouya; Cain, Tyler A.; Van de Walle, Chris G.; Stemmer, Susanne ^[1]

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1. Materials Department, University of California, Santa Barbara, California 93106-5050 (United States)

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.

• OSTI ID: 22412610
• Journal Information: Applied Physics Letters, Vol. 106, Issue 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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