Enhancing the electron mobility via delta-doping in SrTiO3

Details Enhancing the electron mobility via delta-doping in SrTiO3 Enhancing the electron mobility via delta-doping in SrTiO3

2010-10-31

arxiv.org/abs/1011.0159v1

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 4 figures

Scientific paper

We fabricated high-mobility {\delta}-doped structures in SrTiO3 thin films in order to investigate the low temperature electronic transport properties of confined carriers in this system. An enhancement of the electron mobility above the bulk value was observed as the doped layer thickness decreased. High-field Hall measurements revealed that this mobility enhancement originates from higher-mobility electrons in the undoped clean regions, which have quantum-mechanically broadened from the doped layer. Because of the absence of apparent lattice misfit between the layers, this structure is highly suitable for investigating two-dimensional electron gases in SrTiO3.

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