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4. Tunable conductivity at LaAlO3/SrxCa1-xTiO3 (0 ≤ x ≤ 1) heterointerfaces.

Author

Young Moon, Seon, Kim, Dai-Hong, Jung Chang, Hye, Kwon Choi, Jong, Kang, Chong-Yun, Jin Choi, Heon, Hong, Seong-Hyeon, Baek, Seung-Hyub, Kim, Jin-Sang, and Won Jang, Ho

Subjects
*HETEROSTRUCTURES, *ELECTRON gas, *PARTICLES (Nuclear physics), *SUPERLATTICES, *SEMICONDUCTORS
Abstract

The two-dimensional electron gas formed at LaAlO3/SrTiO3 heterointerfaces exhibits a variety of interesting physical properties. Herein, we report on tunable conductivity at LaAlO3/SrxCa1-xTiO3 heterostructures. By changing the Sr content in the SrxCa1-xTiO3 (0 ≤ x ≤ 1) layers, the orthorhombicity of the films, which inevitably accompanies TiO6 octahedral distortions in the unit cells, could be varied. As a result, the interfacial conductivity can be tuned over 6 orders of magnitude. We suggest that the use of pseudosubstrates with chemical substitution or alloying is a promising route to finely tune conductivity at oxide heterointerfaces. [ABSTRACT FROM AUTHOR]

Published
2013
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