Spin-polarized Andreev tunneling through the Rashba chain

Abstract

We demonstrate that the selective equal spin Andreev reflection (SESAR) spectroscopy can be used in STM experiments to distinguish the zero-energy Majorana quasiparticles from the ordinary fermionic states of the Rashba chain. Such technique, designed for probing the p-wave superconductivity, could be applied to the intersite pairing of equal-spin electrons in the chain of magnetic Fe atoms deposited on the superconducting Pb substrate. Our calculations of the effective pairing amplitude for individual spin components imply the magnetically polarized Andreev conductance, which can be used to `filter' the Majorana quasiparticles from the ordinary in-gap states, although the pure spin current (i.e., perfect polarization) is impossible.

arXiv comment8 pages, 6 figures

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• The Majorana spin in magnetic atomic chain systems
• Kondo and Majorana signatures near the singlet-doublet quantum phase transition
• Quadrupole spin polarization as signature of second-order topological superconductors
• How to measure the Majorana polarization of a topological planar Josephson junction
• Magnetic field effects on a nanowire with inhomogeneous Rashba spin-orbit coupling: Spin properties at equilibrium
• Majorana-like localized spin density without bound states in topologically trivial spin-orbit coupled nanowires
• Leakage of Majorana mode into correlated quantum dot nearby its singlet-doublet crossover
• Electrostatical formation of the Majorana quasiparticles in the quantum dot--nanoring structure
• Majorana phase-gate based on the geometric phase
• Delocalisation of Majorana quasiparticles in plaquette--nanowire hybrid system
• Transport signatures of topological phases in double nanowires probed by spin-polarized STM
• Spin-resolved nonlocal transport in proximitized Rashba nanowires
• Interplay between pairing and correlations in spin-polarized bound states
• AI-enhanced tuning of quantum dot Hamiltonians toward Majorana modes
• Majorana Bound State leakage to impurity in Su-Schrieffer-Heeger-Rashba scenario