Quantitative analysis measures anisotropy energy in the superconductor Zr₄Pd₂O, suggesting strong impacts on vortex pinning and critical field.
We present a quantitative analysis of the directional anisotropy energy E^* for the η-carbide-type oxide superconductor Zr₄Pd₂O. Using anisotropy constants derived from elemental contributions ₄ ₂ and spin-orbit coupling considerations, we calculate E^* along principal crystallographic directions $[100]$, $[110]$, and $[111]$. Our calculations reveal the highest anisotropy energy along the $[111]$ direction, which correlates with enhanced vortex pinning and strong spin-orbit coupling effects that contribute to the observed violation of the Pauli paramagnetic limit in this material. These results provide insight into the anisotropic nature of superconductivity in Zr₄Pd₂O and highlight the importance of crystallographic directionality in optimizing high-field superconducting properties.
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Sudhakar Geruganti (2025) studied this question.
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