Superconductivity in the Bi/Ni bilayer

Abstract

Motivated by the recent observations of possible p-wave superconductivity in the bismuth-nickel (Bi/Ni) bilayer, we explore theoretically the possibilities of realizing p-wave superconductivity in this bilayer. We begin with a literature survey on this system and related materials which have similar superconducting transition temperature. From the survey, the superconducting mechanism in this bilayer system is suggested to be phonon mediated type II superconductivity. A simple model is proposed to explain why the p-wave like Andreev reflection signals are likely to be observed in the surface probe, assuming the strong spin-orbit coupled surface state of Bi thin film is not completely destroyed by the formation of alloys.

v.2: 11 pages, 4 figures; Appendix and update on recent experimental results added

References in corpus (9)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Strong spin-orbit splitting on Bi surfaces
• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Experimental evidence for bulk superconductivity in pure Bismuth single crystal at ambient pressure
• Time-Reversal-Symmetry-Breaking Superconductivity in Epitaxial Bismuth/Nickel Bilayers
• Proving Nontrivial Topology of Pure Bismuth by Quantum Confinement
• Nodeless bulk superconductivity in the time-reversal symmetry breaking Bi/Ni bilayer system
• Symmetry and topology of two-dimensional noncentrosymmetric superconductors
• Singlet superconductivity in single-crystal NiBi3 superconductor

Cited by in corpus (11)

• Evidence of triplet superconductivity in Bi/Ni bilayers: Theoretical analysis of point contact Andreev reflection spectroscopy results
• Fully-gapped superconductivity with preserved time-reversal symmetry in NiBi${}_3$ single crystals
• Disorder and Zeeman coupling induced gap-filling states in the nodeless chiral superconducting Bi/Ni bilayer system
• Andreev spectroscopy of the triplet superconductivity state in Bi/Ni bilayer system
• Vortex bound states of charge and magnetic fluctuations-induced topological superconductors in heterostructures
• Magnons and fundamental magnetic interactions in a ferromagnetic monolayer: The case of Ni monolayer
• Ni/Bi bilayers: The effect of thickness on the superconducting properties
• Absence of spontaneous time-reversal symmetry breaking and ferromagnetism in superconducting NiBi3 single crystal
• Half-quantum flux in spin-triplet superconducting rings with bias current
• Observation of the crossover from quantum fluxoid to half-quantum fluxoid in a chiral superconducting device
• Pairing-induced Momentum-space Magnetism and Its Implication In Optical Anomalous Hall Effect In Chiral Superconductors