Unequivocal Determination of Spin-Triplet Superconductivity Using Composite Rings

2022/10/17 by Xu Xiaoying, Xu, Xiaoying, Yufan Li +3
Physics and Astronomy · Engineering · #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #Quantum, superfluid, helium dynamics

paper · pdf · doi:10.48550/arxiv.2210.08733

Abstract

Phase-sensitive measurements on a composite ring made of a superconductor of interest connected by a known singlet s-wave superconductor can unambiguously determine its pairing symmetry. In composite rings with epitaxial β-Bi₂Pd and s-wave Nb, we have observed half-integer quantum flux when Nb is connected to the opposite crystalline ends of β-Bi₂Pd and integer-quantum flux when Nb is connected to the same crystalline ends of β-Bi₂Pd. These findings provide unequivocal evidence of odd-parity pairing state of the triplet superconductor β-Bi₂Pd.

Related

• Signature of chiral superconducting order parameter evidenced in mesoscopic superconductors
• Triplet p-wave superconductivity with ABM state in epitaxial Bi/Ni bilayers
• Spontaneous π flux trapping in granular rings of unconventional superconductors
• Unveiling Intrinsic Triplet Superconductivity in Noncentrosymmetric NbRe through Inverse Spin-Valve Effects
• Odd-parity superconductivity by competing spin-orbit coupling and orbital effect in artificial heterostructures