Coulomb Gap and Correlated Vortex Pinning in Superconductors

Abstract

The positions of columnar pins and magnetic flux lines determined from a decoration experiment on BSCCO were used to calculate the single--particle density of states at low temperatures in the Bose glass phase. A wide Coulomb gap is found, with gap exponent $s\approx 1.2$, as a result of the long--range interaction between the vortices. As a consequence, the variable--range hopping transport of flux lines is considerably reduced with respect to the non--interacting case, the effective Mott exponent being enhanced from $p_0=1/3$ to $p_{\mathrm{eff}}\approx 0.5$ for this specific experiment.

10 pages, Revtex, 4 figures appended as uu-encoded postscript files, also available as hardcopies from [email protected]

Cited by in corpus (16)

• The Flux-Line Lattice in Superconductors
• Marginal Stability in Structural, Spin and Electron Glasses
• Vortex Plastic Flow, $B(x,y,H(t)),M(H(t)),J_c(B(t))$, Deep in the Bose Glass and Mott-Insulator Regimes
• Superfluid Bosons and Flux Liquids: Disorder, Thermal Fluctuations, and Finite-Size Effects
• Interactions, Distribution of Pinning Energies, and Transport in the Bose Glass Phase of Vortices in Superconductors
• Weakly Pinned Bose Glass vs. Mott Insulator Phase in Superconductors
• Properties of the Bose glass phase in irradiated superconductors near the matching field
• Vortex creep and critical current densities in superconducting (Ba,K)Fe${}_2$As${}_2$ single crystals
• Nonequilibrium relaxation and scaling properties of the two-dimensional Coulomb glass in the aging regime
• Non-equilibrium Relaxation and Aging Scaling of the Coulomb and Bose Glass
• Nonequilibrium steady states of driven magnetic flux lines in disordered type-II superconductors
• Structural Relaxation and Aging Scaling in the Coulomb and Bose Glass Models
• Localized Flux Lines and the Bose Glass
• Pinning-depinning transitions in two classes of discrete elastic-string models in (2+1)-dimensions
• Images and nonlocal vortex pinning in thin superfluid films
• Monte Carlo Simulation of the Crossover from Bose Glass to Bragg Glass Phase in Layered BSCCO with Columnar Defects