Two-dimensional electron liquid at the (111) SmTiO{sub 3}/SrTiO{sub 3} interface

Journal Article · Mon Mar 30 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4916963· OSTI ID:22398817

Raghavan, Santosh; Zhang, Jack Y.; Stemmer, Susanne ^[1]

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

Similar to (001) interfaces, a high carrier density, two-dimensional electron liquid (2DEL) is expected to form at (111) RTiO{sub 3}/SrTiO{sub 3} interfaces (R is a trivalent rare earth ion). In this study, epitaxial SmTiO{sub 3} layers were grown on (111) SrTiO{sub 3} surfaces using hybrid molecular beam epitaxy. We report on electrical transport measurements and characterize the carrier densities in the 2DEL and the carrier mobilities at these interfaces. The carrier density is in reasonable agreement with the expected carrier density of ∼2 × 10{sup 14 }cm{sup −2}. Mobility-limiting mechanisms are analyzed and compared with those of (001) interfaces. Collectively, the results indicate that (111) 2DELs are less confined than those at (001) interfaces. These 2DELs should allow for the study of the phenomena induced by the unique topology of the electron system at (111) interfaces.

• OSTI ID: 22398817
• Journal Information: Applied Physics Letters, Vol. 106, Issue 13; 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
CARRIER MOBILITY
COMPARATIVE EVALUATIONS
CRYSTAL GROWTH
ELECTRONS
INTERFACES
LAYERS
LIQUIDS
MOLECULAR BEAM EPITAXY
SAMARIUM COMPOUNDS
STRONTIUM TITANATES
SURFACES
TOPOLOGY
TWO-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL SYSTEMS