Correlated Non-Gaussian phase fluctuations in LaAlO${}_3$/SrTiO${}_3$ heterointerface

Abstract

We probe the existence of large correlated non-Gaussian phase fluctuations in the vicinity of the superconducting phase transition in the conducting layer residing at the interface of LaAlO${}_3$/SrTiO${}_3$ heterostructures. The non-Gaussian fluctuations appear between the Berezinskii-Kosterlitz-Thouless transition temperature $T_{BKT}$ and the mean field transition temperature $T_C$. Subsequent theoretical analysis reveals that non-Gaussianity arises predominantly due to the percolative transition of a Josephson coupled network of superconductors. Our results confirm that the superconductivity in this system is confined to two-dimensions. Our study of the non-Gaussian resistance fluctuation spectrum provides a novel means to explore the BKT-transition in two-dimensional inhomogeneous superconductors.

arXiv comment10 pages, 12 figures

References in corpus (16)

• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Tuning spin-orbit coupling and superconductivity at the SrTiO3/LaAlO3 interface: a magneto-transport study
• Nature of the superconductor-insulator transition in disordered superconductors
• A Universal Critical Density Underlying the Physics of Electrons at the LaAlO3/SrTiO3 Interface
• Two-dimensional superconductivity at a Mott-Insulator/Band-Insulator interface: LaTiO3/SrTiO3
• Gaussian superconducting fluctuations, thermal transport, and the Nernst effect
• Critical thickness for ferromagnetism in LaAlO3/SrTiO3 heterostructures
• Nanoscale Phenomena in Oxide Heterostructures
• Broadening of the Beresinkii-Kosterlitz-Thouless superconducting transition by inhomogeneity and finite-size effects
• Role of the vortex-core energy on the Beresinkii-Kosterlitz-Thouless transition in thin films of NbN
• Survival of superconducting correlations across the 2D superconductor-insulator transition: A finite frequency study
• Probing long-range correlations in the Berezinskii-Kosterlitz-Thouless fluctuation regime of ultra-thin NbN superconducting films using transport noise measurements
• Phase coherent transport in SrTiO3/LaAlO3 interfaces
• Enhanced spin-orbit coupling and charge carrier density suppression in LaAl1-xCrxO3/SrTiO3 heterointerfaces
• Multi-band theory of superconductivity at the LaAlO${}_3$/SrTiO${}_3$ interface
• Probing a spin-glass state in SrRuO3 thin films through higher-order statistics of resistance fluctuations

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• Interplay of spin waves and vortices in the 2D XY model at small vortex-core energy
• Effect of dimensionality on the vortex-dynamics in type-II superconductor
• Quantum phase transition in few-layer NbSe${}_2$ probed through quantized conductance fluctuations
• BKT universality class in the presence of correlated disorder
• Conductivity noise across temperature driven transitions of rare-earth nickelate heterostructures
• Effect of multiband transport on charge carrier density fluctuations at the LaAlO${}_3$/SrTiO${}_3$ interface
• Inhomogeneous superconductivity and quasilinear magnetoresistance at amorphous LaTiO3/SrTiO3 interfaces
• Hidden electronic phase in strained few-layer 1T-TaS2
• Correlated carrier dynamics in a superconducting van der Waals heterostructure
• Effect of spin-orbit interaction on the vortex dynamics in LaAlO${}_3$/SrTiO${}_3$ interfaces near the superconducting transition
• Exploring the Electronic Nature of Spinel Oxides: A Review of Their Electron Interactions and Prospects
• Berezinskii-Kosterlitz-Thouless phase transitions with long-range couplings
• Persistence of the Berezinskii-Kosterlitz-Thouless transition with long-range couplings