P. Samuely

Evidence for Two Superconducting Energy Gaps in MgB2 by Point-Contact Spectroscopy

Experimental support is found for the multiband model of the superconductivity in the recently discovered system MgB(2) with the transition temperature T(c) = 39 K. By means of Andreev reflection, evidence is obtained for two distinct superconducting energy gaps. The sizes of the two gaps ( Delta(S) = 2.8 meV and Delta(L) = 7 meV) are, respectively, smaller and larger than the expected weak coupling value. Because of the temperature smearing of the spectra the two gaps are hardly distinguishable at elevated temperatures, but when a magnetic field is applied the presence of two gaps can be demonstrated close to the bulk T(c) in the raw data.

Anisotropy of the upper critical field and critical current in single crystal MgB2

We report on specific-heat, high-magnetic-field transport, and ac-susceptibility measurements on

Evidence for two-gap superconductivity in Ba 0.55 K 0.45 Fe 2 As 2 from directional point-contact Andreev-reflection spectroscopy

{\mathrm{MgB}}_{2}

Energy gap of intermediate-valentSmB6studied by point-contact spectroscopy

single crystals. The upper critical field for magnetic fields perpendicular and parallel to the basal planes is presented in the entire temperature range. A very different temperature dependence has been observed in the two directions, which yields a temperature-dependent anisotropy with

Point-contact spectroscopy of MgB2

\ensuremath{\Gamma}\ensuremath{\sim}5

Specific heat measurements of a superconducting NbS2 single crystal in an external magnetic field: Energy gap structure

at low temperatures and

Point-contact spectroscopy of the electron-phonon interaction in single-crystal LaB6

\ensuremath{\sim}2

Comment on "Band Filling and Interband Scattering Effects in MgB~2: Carbon versus Aluminium Doping"

near

Single-gap superconductivity in β − B i 2 Pd

{T}_{c}.

Superconducting energy gap in MgCNi3 single crystals: Point-contact spectroscopy and specific-heat measurements

A peak effect is observed for