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Epitaxial strain modulated electronic properties of interface controlled nickelate superlattices

Middey, S and Meyers, D and Ojha, Shashank Kumar and Kareev, M and Liu, X and Cao, Y and Freeland, J W and Chakhalian, J (2018) Epitaxial strain modulated electronic properties of interface controlled nickelate superlattices. In: PHYSICAL REVIEW B, 98 (4).

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Official URL: https://dx.doi.org/10.1103/PhysRevB.98.045115

Abstract

Perovskite nickelate heterostructures consisting of single unit cells of EuNiO3 and LaNiO3 have been grown on a set of single crystalline substrates by pulsed laser interval deposition to investigate the effect of epitaxial strain on electronic and magnetic properties at the extreme interface limit. Despite the variation of substrate in-plane lattice constants and lattice symmetry, the structural response to heterostructuring is primarily controlled by the presence of the EuNiO3 layer. In sharp contrast to bulk LaNiO3 or EuNiO3, the superlattices grown under tensile strains exhibit metal-to-insulator transitions (MIT) below room temperature. The onset of magnetic and electronic transitions associated with the MIT can be further separated by application of large tensile strain. Furthermore, these transitions can be entirely suppressed by very small compressive strain. X-ray resonant absorption spectroscopy measurements reveal that such strain-controlled MIT is directly linked to a strain-induced self-doping effect without any chemical doping.

Item Type: Journal Article
Additional Information: Copyright of this article belong to AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 24 Jul 2018 14:54
Last Modified: 24 Jul 2018 14:54
URI: http://eprints.iisc.ac.in/id/eprint/60281

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