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arXiv · 1903.08581

Probing the superconducting ground state of ZrIrSi: A $μ$SR study

K. Panda·A. Bhattacharyya·D. T. Adroja·N. Kase·P. K. Biswas·Surabhi Saha·Tanmoy Das·M. Lees·A. D. Hillier
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Abstract

The superconducting ground state of newly reported ZrIrSi is probed by means of $μ$SR technique along with resistivity measurement. The occurrence of superconductivity at $T_\mathrm{C}$ = 1.7 K is confirmed by resistivity measurement. ZF-$μ$SR study revealed that below $T_\mathrm{C}$, there is no spontaneous magnetic field in the superconducting state, indicates TRS is preserved in case of ZrIrSi. From TF-$μ$SR measurement, we have estimated the superfluid density as a function of temperature, which is described by an isotropic $s-$wave model with a superconducting gap $2Δ(0)/k_\mathrm{B}T_\mathrm{C}$ = 5.1, indicates the presence of strong spin-orbit coupling. {\it Ab-initio} electronic structure calculation indicates that there are four bands passing through the Fermi level, forming four Fermi surface pockets. We find that the low-energy bands are dominated by the $4d$-orbitals of transition metal Zr, with substantially lesser weight from the $5d$-orbitals of the Ir-atoms.

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K. Panda, A. Bhattacharyya, D. T. Adroja, N. Kase, P. K. Biswas, Surabhi Saha, Tanmoy Das, M. Lees, A. D. Hillier. 2019-03-20. Probing the superconducting ground state of ZrIrSi: A $μ$SR study. https://doi.org/10.1103/physrevb.99.174513

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