Evidence for charge-vortex duality at the LaAlO${}_3$/SrTiO${}_3$ interface

Abstract

The concept of duality has proved extremely powerful in extending our understanding in many areas of physics (1, 2). Charge-vortex duality has been proposed (3, 4) as a model to understand the superconductor to insulator transition (SIT) in disordered thin films (5, 6) and Josephson junction arrays (7, 8, 9). In this model, on the superconducting side, one has delocalized Cooper pairs but localized vortices; while on the insulating side, one has localized Cooper pairs but mobile vortices. Here we show a new experimental manifestation of this duality in the electron gas that forms at the interface between LaAlO${}_3$ (LAO) and SrTiO${}_3$ (STO) (10, 11, 12, 13, 14). The effect is due to the motion of vortices generated by the magnetization dynamics of the ferromagnet that also forms at the same interface (14, 15, 16), which results in an increase in resistance on the superconducting side of the transition, but an increase in conductance on the insulating side.

arXiv comment25 pages, 4 figures, 6 supplementary figures

References in corpus (8)

• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
• Coexistence of Magnetic Order and Two-dimensional Superconductivity at LaAlO${}_3$/SrTiO${}_3$ Interfaces
• Coexistence of superconductivity and ferromagnetism in two dimensions
• Tailoring a two-dimensional electron gas at the LaAlO3/SrTiO3 (001) interface by epitaxial strain
• Superconductivity and Ferromagnetism in Oxide Interface Structures: Possibility of Finite Momentum Pairing
• Transport Through Quantum Melts
• Resistance in Superconductors

Cited by in corpus (29)

• Phase separation from electron confinement at oxide interfaces
• Multi-band superconductivity and nanoscale inhomogeneity at oxide interfaces
• Observation of Quantum Griffiths Singularity and Ferromagnetism at Superconducting LaAlO3/SrTiO3(110) Interface
• Evidence of weak superconductivity at the room-temperature grown LaAlO${}_3$/SrTiO${}_3$ interface
• Phase diagrams of voltage-gated oxide interfaces with strong Rashba coupling
• Anisotropic, multi-carrier transport at the (111) LaAlO${}_3$/SrTiO${}_3$ interface
• Inhomogeneous multi-carrier superconductivity at LaXO3/SrTiO3 (X=Al or Ti) oxide interfaces
• Magnetoresistance in the superconducting state at the (111) LaAlO${}_3$/SrTiO${}_3$ interface
• Multi-band theory of superconductivity at the LaAlO${}_3$/SrTiO${}_3$ interface
• Pseudo-gap in tunneling spectra as a signature of inhomogeneous superconductivity in oxide interfaces
• Evolution of ferromagnetism in two-dimensional electron gas of LaTiO3/SrTiO3
• Magnetic and nematic orders of the 2DEG at oxide (111) surfaces and interfaces
• Evidence for Superconducting Phase Coherence in the Metallic/Insulating Regime of the LaAlO3-SrTiO3 Interface Electron System
• Intrinsic magnetism in KTaO${}_3$ heterostructures
• Gate-tunable superconductivity at SrTiO3 surface realized by Al layer evaporation
• Magnetic field tuned superconductor-to-insulator transition at the LaAlO${}_3$ /SrTiO${}_3$ interface
• Superconducting magic-angle twisted trilayer graphene hosts competing magnetic order and moiré inhomogeneities
• Observation of transient superconductivity at the LaAlO${}_3$/SrTiO${}_3$ interface
• Density inhomogeneities and Rashba spin-orbit coupling interplay in oxide interfaces
• Possible mechanisms of electronic phase separation in oxide interfaces
• Signatures of Electronic Nematicity in (111) LaAlO${}_3$/SrTiO${}_3$ Interfaces
• Anisotropic Magnetoresistance in Multiband Systems: 2DEGs and Polar Metals at Oxide Interfaces
• Vortex excitations in the Insulating State of an Oxide Interface
• Electrostatic tuning of magnetism at the conducting (111) (La${}_{0.3}$Sr${}_{0.7}$)(Al${}_{0.65}$Ta${}_{0.35}$)/SrTiO${}_3$ interface
• The Vortex Signature of Discrete Ferromagnetic Dipoles at the LaAlO${}_3$/SrTiO${}_3$ Interface
• Low temperature magnetoresistance of (111) (La${}_{0.3}$Sr${}_{0.7}$)(Al${}_{0.65}$Ta${}_{0.35}$)/SrTiO${}_3$
• Strong spin-orbit coupling and magnetism in (111) (La${}_{0.3}$Sr${}_{0.7}$)(Al${}_{0.65}$Ta${}_{0.35})$/SrTiO${}_3$
• Non-equilibrium restoration of duality symmetry in the vicinity of the superconductor-insulator transition
• Effect of microstructure on the electronic transport properties of epitaxial CaRuO${}_3$ thin films