Tunneling spectroscopy and Josephson current of superconductor-ferromagnet hybrids on the surface of a 3D TI

Abstract

We investigate the charge transport property of superconductor (S) /normal metal (N) / ferromagnet insulator (FI) /(normal metal) N' and S/N/FI/N'/S Josephson junctions on a three-dimensional topological insulator surface. We find asymmetric local density of states (LDOSs) in a S/N/FI/N' junction and show that the finite length of the N interlayer gives rise to subgap resonant spikes in the differential conductance and LDOSs. In a S/N/FI/N'/S junction, the Josephson current shows a non-sinusoidal current-phase relation and the N (or N') interlayer decreases the magnitude of the critical current monotonically.

8 pages, 6 figures

References in corpus (13)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Insulators with Inversion Symmetry
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Topological Field Theory of Time-Reversal Invariant Insulators
• Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
• First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
• Electrically detected interferometry of Majorana fermions in a topological insulator
• Surface quantized anomalous Hall current and magneto-electric effect in magnetically disordered topological insulators
• Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
• Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
• Non-sinusoidal current-phase relationship in Josephson junctions from the 3D topological insulator HgTe
• Dirac Green's function approach to graphene-superconductor junctions with well defined edges

Cited by in corpus (17)

• Transport in two-dimensional topological materials: recent developments in experiment and theory
• Odd-frequency superconducting pairing in one-dimensional systems
• Tunable Josephson diode effect on the surface of topological insulators
• Theory of Majorana zero modes in unconventional superconductors
• Superconducting proximity effect in three-dimensional topological insulators in the presence of a magnetic field
• Josephson effect and odd-frequency pairing in superconducting junctions with unconventional magnets
• Anomalous Josephson effect in d-wave superconductor junctions on TI surface
• Subgap states in two dimensional spectroscopy of unconventional superconductors using graphene
• Phase-tunable electron transport assisted by odd-frequency Cooper pairs in topological Josephson junctions
• Dirac point formation revealed by Andreev tunneling in superlattice-graphene/superconductor junctions
• Edge-induced pairing states in a Josephson junction through a spin-polarized quantum anomalous Hall insulator
• Odd-frequency superconducting pairing due to multiple Majorana edge modes in driven topological superconductors
• Identifying Majorana bound states at quantum spin Hall edges using a metallic probe
• Study on Green's function on TI surface
• Optical conductivity of the Majorana mode at the s- and d-wave topological superconductor edge
• Confinement-induced zero-bias peaks in conventional superconductor hybrids
• Particle-hole spectral asymmetry at the edge of multiorbital noncentrosymmetric superconductors