We report resistivity measurements of a CrAs single crystal in a wide temperature range, with the specific aim to assess the applicability of the Bloch-Gruneisen formula for electron-phonon resistivity. We find that the resistance reaches a residual value at Tc=4.2 K and its temperature dependence cannot be fitted only with a suitable Bloch-Gruneisen formula in the whole temperature range, even though we are able to calculate a well defined transport Debye temperature. The observed temperature dependent resistivity seems to suggest a non phonon-mediated superconducting pairing, supporting a magnetic fluctuation mechanism as the likely glue for the superconducting coupling.
@article{arxiv.1812.09957,
title = {Resistivity measurements unveil microscopic properties of CrAs},
author = {A. Nigro and P. Marra and C. Autieri and W. Wu and J. G. Cheng and J. Luo and C. Noce},
journal= {arXiv preprint arXiv:1812.09957},
year = {2019}
}