Electrostatic Modulation of the Superfluid Density in a Ultrathin La2-xSrxCuO4 Film

Abstract

By capacitively charging an underdoped ultrathin La2-xSrxCuO4 film with an electric field applied across a gate insulator with a high dielectric constant, relative changes of the areal superfluid density n_{s\Box}$ofunprecedentedstrengthwereobservedinmeasurementsofthefilmkineticinductance.Although$n_{s\Box}$appearstobesubstantiallyreducedbydisorder,thedataprovide,forthefirsttimeonthesamesample,directcompellingevidencefortheUemurarelation$T_{c} \propto n_{s\Box}(T=0)$ in the underdoped regime of copper-oxide superconductors.

arXiv comment4 pages, 3 figures

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• Universal scaling relation in high-temperature superconductors
• A Low-Temperature Atomic Layer Deposition Liftoff Method for Microelectronic and Nanoelectronic Applications
• Critical temperature and superfluid density suppression in disordered high-$T_c$ cuprate superconductors
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• Pseudogaps in Underdoped Cuprates
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• Doping dependence of the vortex-core energy in bilayer films of cuprates
• Size effects in the nonlinear resistance and flux creep in a virtual Berezinskii-Kosterlitz-Thouless state of superconducting films
• Correlation between oxygen isotope effects on the transition temperature and the magnetic penetration depth in high-temperature superconductors close to optimal doping
• Functional renormalization group for d-wave superconductivity in Hubbard type models
• Homes Scaling in Ionic Liquid Gated La${}_2$CuO${}_{4+x}$ Thin Films
• High-Tc Superconductivity in Ultra-thin Crystals: Implications for Microscopic Theory
• Transport properties of clean and disordered Josephson junction arrays
• Helical instability of charged vortices in layered superconductors
• Nanoscale Phenomenology from Visualizing Pair Formation Experiment
• Anyon Bosonization of 2D Fermions and Single Boson Phase Diagram Implied from Experiment on Visualizing Pair Formation in Superconductor Bi_2Sr_2CaCu_2O_{8+δ}
• On the occurrence of Berezinskii-Kosterlitz-Thouless behavior in highly anisotropic cuprate superconductors
• Magnetic screening in proximity effect Josephson-junction arrays
• Superfluid density in Bi2Sr2CaCu2O8+x from optimal doping to severe underdoping and its implications