Comments on gap anisotropy and nodal constant Fermi velocity in a superconductor, BSCCO

Details Comments on gap anisotropy and nodal constant Fermi velocity in a superconductor, BSCCO Comments on gap anisotropy and nodal constant Fermi velocity in a superconductor, BSCCO

2008-04-26

arxiv.org/abs/0804.4209v1

Physica C 460-462 (2007) 943-945

Physics

Condensed Matter

Superconductivity

2 pages, 2 figures

Scientific paper

10.1016/j.physc.2007.03.337

On the basis of both the inhomogeneity of a superconductor, BSCCO-2212, and the effect of measurement, we reveal that an anomalously large gap anisotropy known as evidence of dx2-y2-wave symmetry [Phys. Rev. Lett. 70 (1993) 1553] is not intrinsic, and that the constant Fermi velocity at node as an unsolved problem [Nature 423 (2003) 398] is due to the dx2-y2-wave insulator-metal transition.

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