Conducting LaVO3/SrTiO3 Interface: Is Cationic Stoichiometry Mandatory?

Tomar, Ruchi and Varma, Rahul Mahavir and Kumar, Nand and Sarma, D D and Maryenko, Denis and Chakraverty, Suvankar (2019) Conducting LaVO3/SrTiO3 Interface: Is Cationic Stoichiometry Mandatory? In: ADVANCED MATERIALS INTERFACES .

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Abstract

The origin of the conductivity at the interface of two insulating perovskite oxides is a matter of intensive studies. The conductivity generated at the interface of insulating LaVO3 (LVO) and SrTiO3 (STO) is explained in terms of polar catastrophe. Here, the authors grown LVO films on (001) TiO2-terminated STO substrate employing pulsed laser deposition technique and demonstrate a transition from conducting to insulating interface by changing the La-stoichiometry by only 1%, whereby such transition takes place for La-deficient films. The effect of cation (non)stoichiometry of LVO film on both carrier density and mobility is studied and compared with previously reported LaAlO3-STO interface. This observation suggests a revisit to the explanation of possible origin of such conductivity beyond the polar catastrophe scenario and can be instrumental in search for novel conducting interfaces.

Item Type:	Journal Article
Publication:	ADVANCED MATERIALS INTERFACES
Publisher:	WILEY
Additional Information:	Copyright of this article belongs to WILEY
Keywords:	2D electron gas; electronic transport; film stoichiometry; oxides heterostructure
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	03 Feb 2020 05:36
Last Modified:	03 Feb 2020 05:36
URI:	http://eprints.iisc.ac.in/id/eprint/64049

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