Fallacies on pairing symmetry and intrinsic electronic Raman spectrum in high-Tc cuprate superconductors

Abstract

Certain significant fallacies are involved in discussions of the high-Tc mechanism unsolved for over 30 years in cuprate superconductors. These fallacies are explored with the aim of unravelling this mechanism. Moreover, using polarised electronic Raman scattering in inhomogeneous underdoped cuprate superconductors, the intrinsic nonlinear Raman spectrum is obtained by subtracting the pseudogap characteristic of a nonlinear from the linear Raman spectrum measured in the B2g mode of the node area below the critical temperature. The intrinsic nonlinear behaviour implies the existence of the nodal superconducting gap denying dx2-y2-wave pairing symmetry. An origin of the nodal superconducting gap is discussed.

3 figs., 32 ref

References in corpus (3)

• Pseudogap, Superconducting Gap, and Fermi Arc in High-Tc Cuprates Revealed by Angle-Resolved Photoemission Spectroscopy
• Superconducting electronic state in optimally doped YBa2Cu3O7-d observed with laser-excited angle-resolved photoemission spectroscopy
• Comments on gap anisotropy and nodal constant Fermi velocity in a superconductor, BSCCO