Disorder induced multifractal superconductivity in monolayer niobium dichalcogenides

Abstract

The interplay between disorder and superconductivity is a subtle and fascinating phenomenon in quantum many body physics. The conventional superconductors are insensitive to dilute nonmagnetic impurities, known as the Anderson's theorem. Destruction of superconductivity and even superconductor-insulator transitions occur in the regime of strong disorder. Hence disorder-enhanced superconductivity is rare and has only been observed in some alloys or granular states. Because of the entanglement of various effects, the mechanism of enhancement is still under debate. Here we report well-controlled disorder effect in the recently discovered monolayer NbSe${}_2$ superconductor. The superconducting transition temperatures of NbSe${}_2$ monolayers are substantially increased by disorder. Realistic theoretical modeling shows that the unusual enhancement possibly arises from the multifractality of electron wave functions. This work provides the first experimental evidence of the multifractal superconducting state.

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• Two-eigenfunction correlation in a multifractal metal and insulator
• Order parameter fluctuations at a buried quantum critical point
• Superconductor-insulator transitions: Phase diagram and magnetoresistance
• Global critical temperature in inhomogeneous superconductors induced by multifractality
• Berezinskii-Kosterlitz-Thouless transition in homogeneously disordered superconducting films

Cited by in corpus (60)

• Quantum breakdown of superconductivity in low-dimensional materials
• Observation of superconducting collective modes from competing pairing instabilities in single-layer NbSe${}_2$
• Enhanced, phase coherent, multifractal-like, two-dimensional superconductivity
• Evidence of nodal superconductivity in monolayer 1H-TaS${}_2$ with hidden order fluctuations
• Superconductivity at the three-dimensional Anderson metal-insulator transition
• Confinement-engineered superconductor to correlated-insulator transition in a van der Waals monolayer
• Destruction of superconductivity through phase fluctuations in ultrathin a-MoGe films
• Tailoring Superconductivity in Large-Area Single-Layer NbSe2 via Self-Assembled Molecular Adlayers
• Effective Theory of Superconductivity in Strongly-Coupled Amorphous Materials
• Multifractally-enhanced superconductivity in thin films
• Nontrivial doping evolution of electronic properties in Ising-superconducting alloys
• Enhanced Superconductivity in Quasi-periodic Crystals
• Tuning Superinductors by Quantum Coherence Effects for Enhancing Quantum Computing
• Superconductivity near the Mott-Ioffe-Regel limit in the high-entropy alloy superconductor (ScZrNb)${}_{1-x}$(RhPd)${}_x$ with a CsCl-type lattice
• Josephson effect in a Fibonacci quasicrystal
• Charge density wave and superconductivity competition in Lu${}_5$Ir${}_4$Si${}_{10}$ : a proton irradiation study
• Superconducting dome by tuning through a Van Hove singularity in a two-dimensional metal
• Superconducting FeSe monolayer with milli-electron volt Fermi energy
• Criticality Across the Energy Spectrum from Random, Artificial Gravitational Lensing in Two-Dimensional Dirac Superconductors
• Revealing the two-dimensional electronic structure and anisotropic superconductivity in a natural van der Waals superlattice (PbSe)${}_{1.14}$NbSe${}_2$
• Real-space BCS-BEC crossover in FeSe monolayer
• Enhanced Amplitude for Superconductivity due to Spectrum-wide Wave Function Criticality in Quasiperiodic and Power-law Random Hopping Models
• Raman spectroscopy of few-layers TaS${}_2$ and Mo-doped TaS${}_2$ with enhanced superconductivity
• Controlling magnetism through Ising superconductivity in magnetic van der Waals heterostructures
• Ising superconductivity: a first-principles perspective
• Quasidisorder Induced Topology
• Twisted Bogoliubov quasiparticles in the superconducting NbSe${}_2$ monolayer on graphene
• Visualizing the multifractal wavefunctions of a disordered two-dimensional electron gas
• Short-range interactions are irrelevant at the quasiperiodic-driven Luttinger Liquid to Anderson Glass transition
• Generalized multifractality at spin quantum Hall transition
• Pseudogap and weak multifractality in disordered Mott charge-density-wave insulator
• The fundamental localization phases in quasiperiodic systems: A unified framework and exact results
• Atomically sharp 1D interfaces in 2D lateral heterostructures of VSe${}_2$-NbSe${}_2$ monolayers
• Superconductivity of high-entropy-alloy-type transition-metal zirconide (Fe,Co,Ni,Cu,Ga)Zr2
• Disorder-broadened phase boundary with enhanced amorphous superconductivity in pressurized In2Te5
• Multifractally-enhanced superconductivity in two-dimensional systems with spin-orbit coupling
• Impurity-induced excitations in a topological two-dimensional ferromagnet/superconductor van der Waals moiré heterostructure
• Superconductivity in a disordered metal with Coulomb interactions
• Generalized surface multifractality in 2D disordered systems
• Local density of state fluctuations in 2D superconductor as a probe of quantum diffusion
• Superconductivity, generalized random phase approximation and linear scaling methods
• High quality Fe1+yTe synthesized by chemical vapor deposition with conspicuous vortex flow
• Unconventional pairing in Ising superconductors: Application to monolayer NbSe${}_2$
• Neel proximity effect in superconductor/antiferromagnet heterostructures
• How spectrum-wide quantum criticality protects surface states of topological superconductors from Anderson localization: Quantum Hall plateau transitions (almost) all the way down
• Enhanced wave localization in multifractal scattering media
• Quantum Fluctuations and Multifractally-Enhanced Superconductivity in Disordered Thin Films
• Quenched dynamics and pattern formation in clean and disordered Bogoliubov-de Gennes superconductors
• Exploring the vortex phase diagram of Bogoliubov-de Gennes disordered superconductors
• Experimental observation of exact quantum critical states
• Strong phase coherence and vortex matter in a fractal system with proximity-induced superconductivity
• Unconventional superconductivity in monolayer transition metal dichalcogenides
• Landau-Level Quantization and Band Splitting of FeSe Monolayers Revealed by Scanning Tunneling Spectroscopy
• Direct evidence for two-gap superconductivity in hydrogen-intercalated titanium diselenide
• Merohedral disorder and impurity impacts on superconductivity of fullerenes
• Robustness of superconductivity to external pressure in high-entropy-alloy-type metal telluride AgInSnPbBiTe5
• Pressure-induced concurrent amorphization and superconductivity in topological material NbNiTe5
• Spectroscopic evidence of disorder-induced quantum phase transitions in monolayer Fe(Te,Se) superconductor
• Multifractal correlations of the local density of states in dirty superconducting films
• Advanced approach of superconducting gap function extraction from tunneling experiments