Non-universal current flow near the metal-insulator transition in an oxide interface
arXiv:2103.08658 · doi:10.1038/s41467-021-23393-5
Abstract
In systems near phase transitions, macroscopic properties often follow algebraic scaling laws, determined by the dimensionality and the underlying symmetries of the system. The emergence of such universal scaling implies that microscopic details are irrelevant. Here, we locally investigate the scaling properties of the metal-insulator transition at the LaAlO3/SrTiO3 interface. We show that, by changing the dimensionality and the symmetries of the electronic system, coupling between structural and electronic properties prevents the universal behavior near the transition. By imaging the current flow in the system, we reveal that structural domain boundaries modify the filamentary flow close to the transition point, preventing a fractal with the expected universal dimension from forming. Our results offer a generic platform to engineer electronic transitions on the nanoscale.
arXiv comment19 pages, 6 figures
References in corpus (32)
- Complexity in Strongly Correlated Electronic Systems
- Mott transition in VO2 revealed by infrared spectroscopy and nano-imaging
- Electric Field Control of the LaAlO/SrTiO Interface Ground State
- A Universal Critical Density Underlying the Physics of Electrons at the LaAlO3/SrTiO3 Interface
- Physics of SrTiO-based heterostructures and nanostructures: a review
- Dominant mobility modulation by the electric field effect at the LaAlO_3 / SrTiO_3 interface
- Imaging currents in HgTe quantum wells in the quantum spin Hall regime
- Large capacitance enhancement and negative compressibility of two-dimensional electronic systems at LaAlO/SrTiO interfaces
- Microwave imaging of mesoscopic percolating network in a manganite thin film
- Locally enhanced conductivity due to the tetragonal domain structure in LaAlO/SrTiO heterointerfaces
- Transport in strongly correlated two dimensional electron fluids
- Common Fermi-liquid origin of T-squared resistivity and superconductivity in n-type SrTiO3
- Critical doping for the onset of a two-band superconducting ground state in SrTiO
- Structurally Triggered Metal-Insulator Transition in Rare-Earth Nickelates
- Local Electrostatic Imaging of Striped Domain Order in LaAlO3/SrTiO3
- Towards two-dimensional metallic behavior at LaAlO3/SrTiO3 interfaces
- Ultrafast strain engineering in complex oxide heterostructures
- Metallicity and superconductivity in doped strontium titanate
- Dynamical response and confinement of the electrons at the LaAlO3/SrTiO3 interface
- Thickness dependence of the mobility at the LaAlO_3 / SrTiO_3 interface
- Imaging and tuning polarity at SrTiO3 domain walls
- Striped nanoscale phase separation at the metal-insulator transition of heteroepitaxial nickelates
- Ubiquitous strong electron phonon coupling at the interface of FeSe/SrTiO3
- Effective medium theory for superconducting layers: A systematic analysis including space correlation effects
- Anisotropic transport at the LaAlO3/SrTiO3 interface explained by microscopic imaging of channel-flow over SrTiO3 domains
- One-Dimensional Nature of Pairing and Superconductivity at the LaAlO/SrTiO Interface
- Nanoscale Electrostatic Control of Oxide Interfaces
- Metal-Insulator Transition of the LaAlO3-SrTiO3 Interface Electron System
- Resonant phonon coupling across the La{1-x}Sr{x}MnO{3}/SrTiO{3} interface
- One-dimensional Quantum Wire Formed at the Boundary Between Two Insulating LaAlO3/SrTiO3 Interfaces
- Coupling lattice instabilities across the interface in ultrathin oxide heterostructures
- Shubnikov-de Haas-like Quantum Oscillations in Artificial One-Dimensional LaAlO3/SrTiO3 Electron Channels