title: Giant reversible nanoscale piezoresistance at room temperature in Sr2IrO4 thin films.
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.
authors: ICN2-Institut Català de Nanociència i Nanotecnologia, Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain. neus.domingo@cin2.es xavi.marti@igsresearch.com gustau.catalan@cin2.es.
authors: Neus
authors: N
authors: Domingo
authors: Laura
authors: L
authors: López-Mir
authors: Markos
authors: M
authors: Paradinas
authors: Vaclav
authors: V
authors: Holy
authors: Jakuv
authors: J
authors: Železný
authors: Di
authors: D
authors: Yi
authors: Siriyara J
authors: SJ
authors: Suresha
authors: Jian
authors: J
authors: Liu
authors: Claudy
authors: C
authors: Rayan Serrao
authors: Ramamoorthy
authors: R
authors: Ramesh
authors: Carmen
authors: C
authors: Ocal
authors: Xavi
authors: X
authors: Martí
authors: Gustau
authors: G
authors: Catalan