Observation of Quantum Griffiths Singularity and Ferromagnetism at Superconducting LaAlO3/SrTiO3(110) Interface

Abstract

Diverse phenomena emerge at the interface between band insulators LaAlO3 and SrTiO3, such as superconductivity and ferromagnetism, showing an opportunity for potential applications as well as bringing fundamental research interests. Particularly, the two-dimensional electron gas formed at LaAlO3/SrTiO3 interface offers an appealing platform for quantum phase transition from a superconductor to a weakly localized metal. Here we report the superconductor-metal transition in superconducting two-dimensional electron gas formed at LaAlO3/SrTiO3(110) interface driven by a perpendicular magnetic field. Interestingly, when approaching the quantum critical point, the dynamic critical exponent is not a constant but a diverging value, which is a direct evidence of quantum Griffiths singularity raised from quenched disorder at ultralow temperatures. Furthermore, the hysteretic property of magnetoresistance was firstly observed at LaAlO3/SrTiO3(110) interfaces, which suggests potential coexistence of superconductivity and ferromagnetism.

References in corpus (31)

• Magnetic effects at the interface between nonmagnetic oxides
• Continuous Quantum Phase Transitions
• 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
• Rare region effects at classical, quantum, and non-equilibrium phase transitions
• Metallic Quantum Ferromagnets
• Infinite-randomness quantum Ising critical fixed points
• Superconductivity and Ferromagnetism in Oxide Interface Structures: Possibility of Finite Momentum Pairing
• Griffiths singularities and magnetoresistive manganites
• High mobility conduction at (110) and (111) LaAlO3/SrTiO3 interfaces
• Ferromagnetic exchange, spin-orbit coupling and spiral magnetism at the LaAlO_3/SrTiO_3 interface
• Quantum Griffiths effects and smeared phase transitions in metals: theory and experiment
• Evidence for a common physical description of non-Fermi-liquid behavior in f-electron systems
• Infinite-randomness critical point in the two-dimensional disordered contact process
• Kondo-Cluster-Glass State near a Ferromagnetic Quantum Phase Transition
• Topological superconductivity and unconventional pairing in oxide interfaces
• Quantum Griffiths Phase in the weak itinerant ferromagnetic alloy Ni${}_{1-x}$V${}_x$
• Renormalization group study of the two-dimensional random transverse-field Ising model
• Discovery of Griffiths phase in itinerant magnetic semiconductor Fe_{1-x}Co_xS_2
• Universal conductance of nanowires near the superconductor-metal quantum transition
• Criticality and quenched disorder: rare regions vs. Harris criterion
• True Superconductivity in a 2D "Superconducting-Insulating" System
• Griffiths phase in diluted magnetic semiconductors
• Critical behavior of Griffiths ferromagnets
• Quantum Criticality in doped CePd_1-xRh_x Ferromagnet
• Ferromagnetism in itinerant two-dimensional t2g systems
• Evidence for charge-vortex duality at the LaAlO${}_3$/SrTiO${}_3$ interface
• Dynamical conductivity at the dirty superconductor-metal quantum phase transition
• Magnetic field tuned superconductor-to-insulator transition at the LaAlO${}_3$ /SrTiO${}_3$ interface

Cited by in corpus (28)

• Highly crystalline 2D superconductors
• Ising Superconductivity and Quantum Phase Transition in Macro-Size Monolayer NbSe2
• Quantum phase transitions in highly crystalline two-dimensional superconductors
• The observation of in-plane quantum Griffiths singularity in two-dimensional crystalline superconductors
• Quantum phase transitions in two-dimensional superconductors: a review on recent experimental progress
• Infinite-randomness fixed point of the quantum superconductor-metal transitions in amorphous thin films
• Anomalous quantum Griffiths singularity in ultrathin crystalline lead films
• Anomalous quantum metal in a 2D crystalline superconductor with intrinsic electronic non-uniformity
• Superconductor-metal quantum transition at the EuO-KTaO3 interface
• Upper critical field and superconductor-metal transition in ultrathin niobium films
• Negative electronic compressibility and nanoscale inhomogeneity in ionic-liquid gated two-dimensional superconductors
• Dynamical vortex phase diagram of 2D superconductivity in gated MoS2
• Charge-Density Waves vs. Superconductivity: Some Results and Future Perspectives
• Size dependent nature of the magnetic-field driven superconductor-to-insulator quantum-phase transitions
• Quantum phase transition in two-dimensional NbN superconducting thin films
• Robust Quantum Griffiths Singularity at above 1.5 Kelvin in Nitride Thin Films
• Vortex excitations in the Insulating State of an Oxide Interface
• The activated scaling behavior of quantum Griffiths singularity in two-dimensional superconductors
• Three-dimensional quantum Griffiths singularity in bulk iron-pnictide superconductors
• Quantum Griffiths singularity in a three-dimensional superconductor to Anderson critical insulator transition
• Novel Emergent Phases in a Two-Dimensional Superconductor
• The Discovery of Tunable Universality Class in Superconducting $\beta$-W Thin Films
• Monte Carlo simulations of a disordered superconductor-metal quantum phase transition
• Critical Behavior and Collective Modes at the Superfluid Transition in Amorphous Systems
• Absence of localized $5d^1$ electrons in KTaO${}_3$ interface superconductors
• Observation of Quantum-Criticality-Class Crossover at the LaAlO${}_3$/KTaO${}_3$ (111) Interface
• Dual Universality and Unconventional Phase Diagram of a Clean 2D Superconductor with Tunable Disorders
• Quantum Griffiths singularity in three-dimensional MoTiN superconducting films