Exploring unconventional superconductivity in PdTe via Point Contact Spectroscopy

TL;DR

This study uses point-contact spectroscopy to investigate the superconducting properties of PdTe, revealing evidence of unconventional pairing symmetries such as p-wave or d-wave, indicating complex superconducting behavior.

Contribution

It provides experimental evidence of unconventional superconductivity in PdTe using PCAR spectroscopy and BTK model analysis.

Findings

Superconducting gap features suggest p-wave or d-wave symmetry.

Anisotropic gap structure deviates from BCS theory.

Strong evidence of unconventional pairing in PdTe.

Abstract

Palladium Telluride (PdTe), a non-layered intermetallic crystalline compound, has captured attention for its unique superconducting properties and strong spin-orbit coupling. In this work, we investigate the superconducting state of PdTe using point-contact Andreev reflection (PCAR) spectroscopy. The experimental data are analyzed using the Blonder-Tinkham-Klapwijk (BTK) model for s, p and d wave symmetries. Our results reveal clear evidence of unconventional superconductivity. The superconducting gap showing features consistent with either p-wave or d-wave pairing symmetries but cannot be fitted with s-wave symmetry. The observed anisotropic gap structure and deviations from conventional BCS behaviour highlight the complex nature of the pairing interactions in PdTe. These findings provide strong evidence of unconventional pairing symmetry in this material.