Enigma of the vortex state in a strongly correlated d-wave superconductor

Abstract

We show that strong electronic repulsion transforms a vortex core from a metallic-type in overdoped regime to a Mott-insulator at underdoping of a strongly correlated d-wave superconductor. This changeover is accompanied by an accumulation of electron density at the vortex core towards local half-filling in the underdoped region, which in turn facilitates the formation of the Mott insulating core. We find that the size of vortices evolves non-monotonically with doping. A similar non-monotonicity of critical field $H_{c2}$, as extracted from superfluid stiffness, is also found. Our results explain some recent experimental puzzles of cuprate superconductors.

References in corpus (11)

• Observation of a Robust Zero-energy Bound State in Iron-based Superconductor Fe(Te,Se)
• Vortex Lattice Melting and Hc2 in underdoped YBa2Cu3Oy
• Grand canonical Gutzwiller approximation for magnetic inhomogeneous systems
• Doping dependence of the upper critical field in La_{2-x}Sr_xCuO_4 from specific heat
• d-Wave Checkerboard Order in Cuprates
• Extended Gutzwiller Approximation for Inhomogeneous System
• Dirac-Bogoliubov-deGennes quasiparticles in a vortex lattice
• From immunity to sudden death: Effects of strong disorder in strongly correlated superconductors
• Superconducting vortex-charge measurement using cavity electromechanics
• Wang-MacDonald d-wave vortex cores observed in heavily overdoped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Fulde-Ferrell-Larkin-Ovchinnikov state in strongly correlated d-wave superconductors

Cited by in corpus (4)

• Vortex-core spectroscopy of $d$-wave cuprate high-temperature superconductors
• Vortex structure in a $d$-wave superconductor obtained by a confinement transition from the pseudogap metal
• Charge modulation in the background of depleted superconductivity inside vortices
• Pinning of Vortices by impurities in Unconventional superconductors