Characterizing the insulator adjacent to the superconductor in Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_{6+\delta }$ ($x=0.3$)

Abstract

The time-averaged and low--frequency noise transport properties were investigated in the vicinity of the superconductor--insulator transition for a Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_{6+\delta }$ ($x=0.3$) thin film. The results are consistent with a superconductor (metal) embedded in a strong insulator, the latter showing two-dimensional variable range hopping properties. The weak insulator behavior -- if any -- is attributed to the metallic inclusions only.

References in corpus (4)

• Optical conductivity and the correlation strength of high temperature copper-oxide superconductors
• Disorder, Metal-Insulator crossover and Phase diagram in high-Tc cuprates
• Percolation model for the superconductor-insulator transition in granular films
• Doping Controlled Superconductor-Insulator Transition in Bi2Sr2-xLaxCaCu2O8+delta