Resistivity measurements unveil microscopic properties of CrAs

Abstract

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.

5 pages, 2 figures

References in corpus (7)

• Superconductivity in the vicinity of antiferromagnetic order in CrAs
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• Spin-orbit coupling effects on the electronic properties of the pressure-induced superconductor CrAs
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• Intra-chain collinear magnetism and inter-chain magnetic phases in Cr3As3-K-based materials
• First order transition in trigonal structure $\text{Ca}{\text{Mn}}_2{\text{P}}_2$
• Tuning interchain ferromagnetic instability in A2Cr3As3 ternary arsenides by chemical pressure and uniaxial strain
• Dimensionality of the superconductivity in the transition metal pnictide WP