Disentangled Cooperative Orderings in Artificial Rare-Earth Nickelates

Middey, S and Meyers, D and Kareev, M and Cao, Yanwei and Liu, X and Shafer, P and Freeland, J W and Kim, J W and Ryan, P J and Chakhalian, J (2018) Disentangled Cooperative Orderings in Artificial Rare-Earth Nickelates. In: PHYSICAL REVIEW LETTERS, 120 (15).

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Abstract

Coupled transitions between distinct ordered phases are important aspects behind the rich phase complexity of correlated oxides that hinder our understanding of the underlying phenomena. For this reason, fundamental control over complex transitions has become a leading motivation of the designer approach to materials. We have devised a series of new superlattices by combining a Mott insulator and a correlated metal to form ultrashort period superlattices, which allow one to disentangle the simultaneous orderings in RENiO3. Tailoring an incommensurate heterostructure period relative to the bulk charge ordering pattern suppresses the charge order transition while preserving metal-insulator and antiferromagnetic transitions. Such selective decoupling of the entangled phases resolves the long-standing puzzle about the driving force behind the metal-insulator transition and points to the site-selective Mott transition as the operative mechanism. This designer approach emphasizes the potential of heterointerfaces for selective control of simultaneous transitions in complex materials with entwined broken symmetries.

Item Type:	Journal Article
Publication:	PHYSICAL REVIEW LETTERS
Publisher:	AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Additional Information:	Copy right for this article belong to AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	04 May 2018 18:48
Last Modified:	04 May 2018 18:48
URI:	http://eprints.iisc.ac.in/id/eprint/59734

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