Revealing the intrinsic superconducting gap anisotropy in surface-neutralized BaFe2(As0.7P0.3)2

Anisotropy of Energy Gap in Superconducting Aluminum

Superconducting gap anisotropy in Nd1.85Ce0.15CuO4: results from photoemission.

We have performed angle resolved photoelectron spectroscopy on the electron doped cuprate superconductor Nd1.85Ce0.15CuO4. A comparison of the leading edge midpoints between the superconducting and normal states reveals a small, but finite shift of 1.5-2 meV near the ( pi,0) position, but no observable shift along the zone diagonal near ( pi/2, pi/2). This is interpreted as evidence for an anis...

Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)2

We report peculiar momentum-dependent anisotropy in the superconducting gap observed by angle-resolved photoemission spectroscopy in BaFe2(As(1-x)P(x))2 (x = 0.30, Tc = 30 K). Strongly anisotropic gap has been found only in the electron Fermi surface while the gap on the entire hole Fermi surfaces are nearly isotropic. These results are inconsistent with horizontal nodes but are consistent with...

A pr 1 99 4 Temperature dependence of the superconducting gap anisotropy in Bi

We present the first detailed data of the momentum-resolved, temperature dependence of the superconducting gap of Bi 2 Sr 2 Ca 1 Cu 2 O 8+x , complemented by similar data on the intensity of the photoemission superconducting conden-sate spectral area. The gap anisotropy between the Γ− ¯ M and Γ−X directions increases markedly with increasing temperature, contrary to what happens for conventiona...

Anisotropy parameters of superconducting

Data on macroscopic superconducting anisotropy of MgB 2 are reviewed. The data are described within a weak coupling two-gaps anisotropic s-wave model of super-conductivity. The calculated ratio of the upper critical fields γ H = H c2,ab /H c2,c increases with decreasing temperature in agreement with available data, whereas the calculated ratio of London penetration depths γ λ = λ c /λ ab decrea...