Giant reversible nanoscale piezoresistance at room temperature in Sr2IrO4 thin films

Publication Type
Journal Article
Authors
DOI
10.1039/c4nr06954d
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. This journal is © The Royal Society of Chemistry.
Notes
cited By 12
Journal
Nanoscale
Volume
7
Year of Publication
2015
Number
8
Pagination
3453-3459
Publisher
Royal Society of Chemistry
ISSN Number
20403364
Keywords
Research Areas
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