Analyzing Intrinsic Superconducting Gap by Means of Measurement of Bi-2212 Superconductors

Abstract

For the mechanism of high-Tc superconductivity in inhomogeneous Bi-2212 superconductors, we demonstrate the intrinsic superconducting gap,GAP_i, and pairing symmetry by using a developed GAP=GAP_i/rho, where GAP is the observed energy gap and 0<rho<=1 is band filling. When rho=1, GAP=GAP_i<=10 meV, measured at a node, is intrinsic. When 0<rho<1, GAP implies an averaging of GAP_i over the measurement region, which is the effect of measurement. From analysis's of conductance data, b=2GAP_i/k_BT_c is less than 4 when rho=1 and the density of state indicates s-wave symmetry. The superconducting gap anisotropy is attributed to the inhomogeneity of the metal phase and the insulating d-wave phase in the measurement region.

4 pages, 2 figures

References in corpus (5)

• Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
• Imaging the granular structure of high-Tc superconductivity in underdoped Bi2Sr2CaCu2O8+x
• Inherent Inhomogeneities in Tunneling Spectra of BSCCO Crystals in the Superconducting State
• Inhomogeneous d-wave superconducting state of a doped Mott insulator
• Paramagnetic Meissner Effect in Superconducting Single Crystals of Ba_{1-x}K_xBiO_3

Cited by in corpus (5)

• High-$T_c$ mechanism through analysis of diverging effective mass for YaBa${}_2$Cu${}_3$O${}_{6+x}$ and pairing symmetry in cuprate superconductors
• Comments on gap anisotropy and nodal constant Fermi velocity in a superconductor, BSCCO
• Explanation of small I_cR_n values observed in inhomogeneous superconductors
• Small Josephson current and product deduced by means of measurement for an inhomogeneous superconductor: Extension of the Ambegaokar - Baratoff theory
• Fallacies on pairing symmetry and intrinsic electronic Raman spectrum in high-Tc cuprate superconductors