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Issue 13, 2017
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O deficient LaAlO3/SrTiO3(110) and (001) superlattices under hydrostatic pressure: a comparative first principles study

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Abstract

We compare the electronic properties of O deficient LaAlO3/SrTiO3 superlattices oriented along the (001) and (110) directions, taking into account the effect of hydrostatic compression and tension. Interfacial O vacancies turn out to be less likely in the case of the (110) orientation, with compression (tension) reducing (enhancing) the energy cost for both orientations. The presence of O vacancies results in the formation of a two-dimensional electron gas, for which we observe a distinct spatial pattern of carrier density that depends strongly on the amount of applied pressure. We clarify the interrelation between structural features and the properties of this electron gas (confinement, carrier density, and mobility).

Graphical abstract: O deficient LaAlO3/SrTiO3(110) and (001) superlattices under hydrostatic pressure: a comparative first principles study

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Publication details

The article was received on 27 Dec 2016, accepted on 23 Feb 2017 and first published on 17 Mar 2017


Article type: Paper
DOI: 10.1039/C6TC05627J
Citation: J. Mater. Chem. C, 2017,5, 3336-3342
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    O deficient LaAlO3/SrTiO3(110) and (001) superlattices under hydrostatic pressure: a comparative first principles study

    A. Albar and U. Schwingenschlögl, J. Mater. Chem. C, 2017, 5, 3336
    DOI: 10.1039/C6TC05627J

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