Metal-Insulator Transition of strained SmNiO3 Thin Films: Structural, Electrical and Optical Properties.

Abstract:

:Samarium nickelate (SmNiO3) thin films were successfully synthesized on LaAlO3 and SrTiO3 substrates using pulsed-laser deposition. The Mott metal-insulator (MI) transition of the thin films is sensitive to epitaxial strain and strain relaxation. Once the strain changes from compressive to tensile, the transition temperature of the SmNiO3 samples shifts to slightly higher values. The optical conductivity reveals the strong dependence of the Drude spectral weight on the strain relaxation. Actually, compressive strain broadens the bandwidth. In contrast, tensile strain causes the effective number of free carriers to reduce which is consistent with the d-band narrowing.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Torriss B,Margot J,Chaker M

doi

10.1038/srep40915

subject

Has Abstract

pub_date

2017-01-18 00:00:00

pages

40915

issn

2045-2322

pii

srep40915

journal_volume

7

pub_type

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