Yu-Shiba-Rusinov bound states induced by a spin flipper in the vicinity of a s-wave superconductor

Abstract

We theoretically study the formation and characteristics of Yu-Shiba-Rusinov bound states within the superconducting gap using a BTK approach in presence of a spin flipper (high spin magnetic impurity). We focus on the zero energy in the conductance spectra and show how a peak is formed at $E=0$ due to the flipping of the magnetic impurity spin but for no flip case a dip forms at $E=0$ in the conductance spectra. This $E=0$ conductance peak is almost quantized at $2e^2/h$ values, however, it arises due to non-topological reasons in contrast to the $E=0$ peak formed due to Majorana states.

arXiv comment11 pages, 6 figures, accepted for publication in Scientific Reports (2018)

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Cited by in corpus (13)

• Theory of Majorana zero modes in unconventional superconductors
• Spin-dependent zero-bias peak in a hybrid nanowire-quantum dot system: Distinguishing isolated Majorana fermions from Andreev bound states
• Zero-frequency supercurrent susceptibility signatures of trivial and topological zero-energy states in nanowire junctions
• Exciting odd frequency equal-spin-triplet correlations at metal-superconductor interfaces
• Andreev spin-noise detector
• Josephson quantum spin thermodynamics
• Honing in on a topological zero-bias conductance peak
• Probing the dichotomy between Yu-Shiba-Rusinov and Majorana bound states via conductance, quantum noise and ${\Delta }_T$ noise
• Surface induced odd-frequency spin-triplet superconductivity as a veritable signature of Majorana bound states
• Spin flip scattering engendered quantum spin torque in a Josephson junction
• Yu-Shiba-Rusinov bound states boost odd-frequency superconductivity
• Confinement-induced zero-bias peaks in conventional superconductor hybrids
• Stability of Majorana bound states in the presence of spin-flip scattering