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Issue 8, 2015
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Giant reversible nanoscale piezoresistance at room temperature in Sr2IrO4 thin films

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Abstract

Layered iridates have been the subject of intense scrutiny on account of their unusually strong spin–orbit coupling, which opens up a narrow bandgap in a material that would otherwise be a metal. This insulating state is very sensitive to external perturbations. Here, we show that vertical compression at the nanoscale, delivered using the tip of a standard scanning probe microscope, is capable of inducing a five orders of magnitude change in the room temperature resistivity of Sr2IrO4. The extreme sensitivity of the electronic structure to anisotropic deformations opens up a new angle of interest on this material, with the giant and fully reversible perpendicular piezoresistance rendering iridates as promising materials for room temperature piezotronic devices.

Graphical abstract: Giant reversible nanoscale piezoresistance at room temperature in Sr2IrO4 thin films

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Supplementary files

Article information


Submitted
24 Nov 2014
Accepted
09 Jan 2015
First published
12 Jan 2015

Nanoscale, 2015,7, 3453-3459
Article type
Communication
Author version available

Giant reversible nanoscale piezoresistance at room temperature in Sr2IrO4 thin films

N. Domingo, L. López-Mir, M. Paradinas, V. Holy, J. Železný, D. Yi, S. J. Suresha, J. Liu, C. Rayan Serrao, R. Ramesh, C. Ocal, X. Martí and G. Catalan, Nanoscale, 2015, 7, 3453
DOI: 10.1039/C4NR06954D

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