Creation of high mobility two-dimensional electron gases via strain induced polarization at an otherwise nonpolar complex oxide interface.
Nano Lett
; 15(3): 1849-54, 2015 Mar 11.
Article
em En
| MEDLINE
| ID: mdl-25692804
ABSTRACT
The discovery of two-dimensional electron gases (2DEGs) in SrTiO3-based heterostructures provides new opportunities for nanoelectronics. Herein, we create a new type of oxide 2DEG by the epitaxial-strain-induced polarization at an otherwise nonpolar perovskite-type interface of CaZrO3/SrTiO3. Remarkably, this heterointerface is atomically sharp and exhibits a high electron mobility exceeding 60,000 cm(2) V(-1) s(-1) at low temperatures. The 2DEG carrier density exhibits a critical dependence on the film thickness, in good agreement with the polarization induced 2DEG scheme.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Dinamarca