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Simultaneous structural and electronic transition. (a) ρ (T) curves of SrIrO3 films of different thicknesses, measured in a HB geometry oriented along the (100) lattice axis. (b) Bulk phase diagram of SrIrO3 and SrTiO3. Perovskite SrIrO3 is orthorhombic at all temperatures, while SrTiO3 undergoes a transition from a cubic to a tetragonal phase below 105 K. (c) Octahedral rotations and cation displacements of orthorhombic SrIrO3 viewed along the pseudocubic [001] (top) and [100] (bottom) directions.
In the paper, co-authored by Carmine Autieri, MagTop member, the authors investigate the coupling lattice instabilities across the interface in ultrathin oxide heterostructures.
ACS Materials Lett.2, 389−394 (2020), arXiv:2002.10555 (2020)