Resistivity and electron-phonon coupling in YNi2B2C single crystals
R. S. Gonnelli, V. A. Stepanov, A. Morello, G. A. Ummarino, G. Behr, G. Graw, S. V. Shulga, S. -L. Drechsler
Abstract
In this work, we present the results of precise measurements of the resistivity of YNi2B2C single crystals with T c = 15.5 K as a function of the temperature, and analyze the experimental data in the framework of the Bloch-Grüneisen theory and electron-phonon coupling. The transport electron-phonon spectral function that best fits the resistivity data is then inserted in the real-axis Eliashberg equations, which are directly solved to determine the normalized tunneling conductance both in s- and d-wave symmetry.
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