New paradigm for a disordered superconductor in a magnetic field

Abstract

We show that while orbital magnetic field and disorder, acting individually weaken superconductivity, acting together they produce an intriguing evolution of a two-dimensional type-II s-wave superconductor. For weak disorder, the critical field H_c at which the superfluid density collapses is coincident with the field at which the superconducting energy gap gets suppressed. However, with increasing disorder these two fields diverge from each other creating a pseudogap region. The nature of vortices also transform from Abrikosov vortices with a metallic core for weak disorder to Josephson vortices with gapped and insulating cores for higher disorder. Our results naturally explain two outstanding puzzles: (1) the gigantic magnetoresistance peak observed as a function of magnetic field in thin disordered superconducting films; and (2) the disappearance of the celebrated zero-bias Caroli-de Gennes-Matricon peak in disordered superconductors.

arXiv comment7+3 pages, 5+3 figures

References in corpus (37)

• Metal-insulator transition in a weakly interacting many-electron system with localized single-particle states
• Scanning tunneling spectroscopy of high-temperature superconductors
• Localization of preformed Cooper-pairs in disordered superconductors
• Nature of the superconductor-insulator transition in disordered superconductors
• Disorder-Induced Inhomogeneities of the Superconducting State Close to the Superconductor-Insulator Transition
• Inhomogeneous Pairing in Highly Disordered s-wave Superconductors
• Nature of the Quantum Metal in a Two-Dimensional Crystalline Superconductor
• Role of Spatial Amplitude Fluctuations in Highly Disordered s-Wave Superconductors
• BCS-BEC Crossover and the Unitary Fermi Gas
• Superconducting density of states and vortex cores of 2H-NbS2
• Superconductivity-Related Insulating Behavior
• Anomalous metals -- failed superconductors
• Localized Superconductivity in the Quantum-Critical Region of the Disorder-Driven Superconductor-Insulator Transition in TiN Thin Films
• Single and two-particle energy gaps across the disorder-driven superconductor-insulator transition
• Theoretical Studies of Superconductor-Insulator Transitions
• Phase fluctuations in a strongly disordered s-wave superconductor close to the metal-insulator transition
• The Elusive Bose Metal
• The Higgs Mode in Disordered Superconductors Close to a Quantum Phase Transition
• Quantum breakdown of superconductivity in low-dimensional materials
• On the existence of a Bose Metal at T=0
• The approach to a superconductor-to-Bose-insulator transition in disordered films
• Superconductivity in the insulating phase above the field-tuned superconductor-insulator transition in disordered indium oxide films
• Superconducting, Insulating, and Anomalous Metallic Regimes in a Gated Two-Dimensional Semiconductor-Superconductor Array
• Superconducting Puddles and "Colossal'' Effects in Underdoped Cuprates
• Quantum Metallicity on the High-Field Side of the Superconductor-Insulator Transition
• Survival of superconducting correlations across the 2D superconductor-insulator transition: A finite frequency study
• Competition of Superconductivity and Antiferromagnetism in a d-Wave Vortex Lattice
• Theory of Magneto-resistance of Disordered Superconducting Films
• Superconductor-insulator transitions: Phase diagram and magnetoresistance
• Dynamical Conductivity Across The Disorder-Tuned Superconductor-Insulator Transition
• Anomalous gap edge dissipation in disordered superconductors on the brink of localization
• High field termination of a Cooper-pair insulator
• Magnetoresistance of an Anderson insulator of bosons
• Quantum meets classical phase transition: Low-temperature anomaly in disordered superconductors near $B_{c2}$
• Superconductor-insulator transitions in three-dimensional indium-oxide at high pressures
• Evidence of zero point fluctuation of vortices in a very weakly pinned a-MoGe thin film
• The Temperature dependence of the magneto-resistance peak in highly disordered superconductors

Cited by in corpus (3)

• Quantum Coherence in Superconducting Vortex States
• Exploring the vortex phase diagram of Bogoliubov-de Gennes disordered superconductors
• Pinning of Vortices by impurities in Unconventional superconductors