Superconducting energy gap in aMgB2film observed by infrared reflectance

Coherence peak and superconducting energy gap in Rb3C60 observed by muon spin relaxation.

Second superconducting energy gap of Nb3Sn observed by breakjunction point-contact spectroscopy

We report on investigations of the superconducting energy gap of the A15 superconductor Nb3Sn by pointcontact spectroscopy of breakjunctions. The voltage-dependent differential conductance dI /dV reveals features of a second energy gap besides the energy gap known from previous tunnel measurements with maxima at 1=3.92 0.16 meV and 2=0.85 0.17 meV as derived from a histogram summarizing the dat...

Energy Gap Reduction in Superconducting Tin Films by Quasiparticle Injection

In Sn-I-Sn-I-Pb tunneling structures the energy gap ~Sn of Sn is reduced by quasiparticle injection via single-particle tunneling between the Sn films. ~Sn as function of the quasiparticle density is probed by the Pb contact and found in agreement with the theory of OWen and Scalapino. An instability of the energy gap of Sn is observed at the critical gap reduction ratio predicted by this theor...

Anisotropy of Energy Gap in Superconducting Aluminum

Energy Gap in Superconducting Fullerides: Optical and Tunneling Studies.

Tunneling and optical transmission studies have been performed on superconducting samples of Rb3C60. At temperatures much below the superconducting transition temperature Tc, the energy gap is 2D ­ 5.2 6 0.2 meV, corresponding to 2DykBTc ­ 4.2. The low temperature density of states and the temperature dependence of the optical conductivity resemble BCS behavior, although there is an enhanced “n...