p-wave superconductivity at the dual topological insulator/s-wave superconductor interface

Abhinab Mohapatra; Gagan Rastogi; R. Ganesan; P. S. Anil Kumar

doi:10.1103/PhysRevB.111.134514

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p-wave superconductivity at the dual topological insulator/s-wave superconductor interface

Abhinab Mohapatra, Gagan Rastogi, R. Ganesan, P. S. Anil Kumar

DOI 10.1103/PhysRevB.111.134514 · Physical Review B

T1

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Abstract

We report evidence for p-wave superconductivity at the dual topological insulator (BiTe)/s-wave superconductor (NbSe2) heterojunction by performing electrical transport measurements. Four-terminal differential conductance measurements performed at low temperatures exhibit sharp V-shaped zero-bias dip and convex-shaped coherence peaks. The multiband two-dimensional Blonder-Tinkham-Klapwijk model employed to fit the differential conductance reveals two distinct superconducting gaps, with anisotropic p-wave and s-wave characters, respectively. Detailed out-of-plane magnetic-field-dependent spectra show that the anisotropic p-wave gap gets destroyed at much smaller fields as compared to the s-wave gap.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
BiTe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CuxBi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown