Spin selective coupling to Majorana zero modes in mixed singlet and triplet superconducting nanowire

Abstract

We theoretically investigate the transport properties of a quasi one dimensional ferromagnet-superconductor junction where the superconductor consists of mixed singlet and triplet pairings. We show that the relative orientation of the stoner field ($\tilde{\mathbf{h}}$) in the ferromagnetic lead and the $\mathbf{d}$ vector of the superconductor acts like a on-off switch for the zero bias conductance of the device. In the regime, where triplet pairing amplitude dominates over the singlet counterpart (topological phase), a pair of Majorana zero modes appear at each end of the superconducting part of the nanowire. When $\tilde{\mathbf{h}}$ is parallel or anti-parallel to the $\mathbf{d}$ vector, transport gets completely blocked due to blockage in pairing while, when $\tilde{\mathbf{h}}$ and $\mathbf{d}$ are perpendicular to each other, the zero energy two terminal differential conductance spectra exhibits sharp transition from $4e^2/h$ to $2e^2/h$ as the magnetization strength in the lead becomes larger than the chemical potential indicating the spin selective coupling of pair of Majorana zero modes to the lead.

This is the published version

References in corpus (17)

• Non-Abelian Anyons and Topological Quantum Computation
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Classification of topological insulators and superconductors in three spatial dimensions
• Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
• Majorana bound states in a coupled quantum-dot hybrid-nanowire system
• Colloquium: Majorana Fermions in nuclear, particle and solid-state physics
• Anomalous modulation of a zero bias peak in a hybrid nanowire-superconductor device
• Zero-bias anomaly in a nanowire quantum dot coupled to superconductors
• Observing Majorana Bound States in p-wave Superconductors Using Noise Measurements in Tunneling Experiments
• Distinguishing a Majorana zero mode using spin resolved measurements
• Anomalous Andreev bound state in non-centrosymmetric superconductors
• Majorana splitting from critical currents in Josephson junctions
• On controlling the bound states in quantum-dot hybrid-nanowire
• Observation of Andreev bound state and multiple energy gaps in the non-centrosymmetric superconductor BiPd
• Distinguishing Majorana bound states from localized Andreev bound states by interferometry
• Transport signatures of superconducting hybrids with mixed singlet and chiral triplet states

Cited by in corpus (3)

• Higher Order Topological Insulator via Periodic Driving
• Transport signatures of Majorana bound states in superconducting hybrid structures
• Topological superconductivity and superconducting diode effect mediated via unconventional magnet and Ising spin-orbit coupling