Point-contact spectroscopy of the phononic mechanism of superconductivity in YB<sub>6</sub>
Point-contact spectroscopy of the phononic mechanism of superconductivity in YB<sub>6</sub>
Lortz et al. [Phys. Rev. B 73, 024512 (2006)] have utilized specific heat and resistivity measurements as "thermal spectroscopies" to deconvolve the spectrum of the electron-phonon interaction in YB$_6$ assuming a major role of the low frequency phonon mode in mediating superconductivity. Here, we present direct point-contact spectroscopy studies of …