Investigations of the superconducting ground state of Zr$_{3} $Ir: Introducing a new noncentrosymmetric superconductor

TL;DR

This paper reports the discovery and characterization of a new noncentrosymmetric superconductor, Zr₃Ir, which exhibits conventional s-wave pairing and preserves time reversal symmetry, contributing to understanding unconventional superconductivity.

Contribution

It introduces a new noncentrosymmetric superconductor Zr₃Ir and provides detailed experimental evidence of its superconducting properties and symmetry characteristics.

Findings

Zr₃Ir is a noncentrosymmetric superconductor with Tₙ = 2.3 K.

Exhibits s-wave superconductivity with preserved time reversal symmetry.

Crystallizes in a tetragonal α-V₃S structure.

Abstract

Superconductivity in materials whose crystal structure lacks inversion symmetry is a prime candidate for unconventional superconductivity. A new noncentrosymmetric compound Zr$_{3}$Ir crystallizes in a tetragonal $ \alpha $-V$_{3} $S structure. The magnetization, specific heat and muon spin rotation confirm s-wave superconductivity, having a transition temperature T$_{c}$ = 2.3 K. Muon spin relaxation confirms the preservation of time reversal symmetry in the superconducting ground state.