Anisotropic electrical transport properties of a two-dimensional electron gas at SrTiO3-LaAlO3 interfaces

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3600339· OSTI ID:1017340

Brinks, Peter ^[1]; Siemons, Wolter ^[2]; Kleibeuker, Josee ^[1]; Koster, Gertjan ^[1]; Rijnders, Guus ^[3]; Huijben, Mark ^[1]

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1. University of Twente, Enschede, Netherlands
2. ORNL
3. MESA+ University of Twente, Enschede, Netherlands

Experimental evidence of strong in-plane anisotropy in electrical properties of the confined electron gas at the SrTiO{sub 3}-LaAlO{sub 3} interface on top of (LaAlO{sub 3}){sub 0.3}(Sr{sub 2}AlTaO{sub 3}){sub 0.7} substrates is provided by detailed transport measurements. Structured measurement geometries in multiple directions are used to show dependence of the sheet resistance with the in-plane angle {theta}, which is fitted with a sine function with a period of 180{sup o}. The carrier density remains constant and a directional dependence of the carrier mobility of more than one order of magnitude is determined with respect to the orientation of the unit cell height steps present at the SrTiO{sub 3}-LaAlO{sub 3} interface.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1017340
• Journal Information: Applied Physics Letters, Vol. 98, Issue 24; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
CARRIER DENSITY
CARRIER MOBILITY
ELECTRICAL PROPERTIES
ELECTRON GAS
ORIENTATION
SUBSTRATES
TRANSPORT