Tuning the electrons at the LaAlO3/SrTiO3 interface：From growth to beyond growth

doi:10.1088/1674-1056/22/12/127301

Abstract Recently, the quasi-two-dimensional electron gas (q2DEG) confined at the interface between LaAlO₃ and SrTiO₃ has attracted significant attention. In this paper, we briefly review experimental methods that have been used to tune the carrier density and mobility of this q2DEG. These methods can be classified into two categories: growth-related tuning (i.e. substrate, growth temperature, oxygen pressure, post-annealing, LaAlO₃ thickness, stoichiometry, and capping layers) and post-growth tuning (i.e. electrostatic field gating, conductive atomic force microscopy and surface adsorbates). Taken together, these methods enable the broad tuning of the electronic properties of this interface.

Keywords: LaAlO₃/SrTiO₃ strontium titanate oxides two-dimensional electron gas interface

Received: 14 September 2013
Accepted manuscript online:

PACS:	73.20.-r	(Electron states at surfaces and interfaces)
	73.40.-c	(Electronic transport in interface structures)
	75.70.Cn	(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

Fund: Project supported by the Department of Energy, Office of Basic Energy Sciences (Grant No. DE-AC02-76SF00515). Xie Yan-Wu was also partially sponsored from the AFOSR-MURI on "Quantum Preservation, Simulation & Transfer in Oxide Nanostructures".

Corresponding Authors: Xie Yan-Wu
E-mail: xieyanwu@stanford.edu

Cite this article:

Xie Yan-Wu (谢燕武), Hwang Harold Y Tuning the electrons at the LaAlO₃/SrTiO₃ interface：From growth to beyond growth 2013 Chin. Phys. B 22 127301

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Tuning the electrons at the LaAlO3/SrTiO3 interface：From growth to beyond growth

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Tuning the electrons at the LaAlO₃/SrTiO₃ interface：From growth to beyond growth