Spin-dependent zero-bias peak in a hybrid nanowire-quantum dot system: Distinguishing isolated Majorana fermions from Andreev bound states

Abstract

Hybrid system composed by a semiconducting nanowire with proximity-induced superconductivity and a quantum dot at the end working as spectrometer was recently used to quantify the so-called degree of Majorana nonlocality [Deng et al., Phys.Rev.B, 98, 085125 (2018)]. Here we demonstrate that spin-resolved density of states of the dot responsible for zero-bias conductance peak strongly depends on the separation between the Majorana bound states (MBSs) and their relative couplings with the dot and investigate how the charging energy affects the spectrum of the system in the distinct scenarios of Majorana nonlocality (topological quality). Our findings suggest that spin-resolved spectroscopy of the local density of states of the dot can be used as a powerful tool for discriminating between different scenarios of the emergence of zero-bias conductance peak.

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• Distinguishing trivial and topological zero energy states in long nanowire junctions
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• Topological superconductivity and Majorana states in low-dimensional systems
• Majorana/Andreev crossover and the fate of the topological phase transition in inhomogeneous nanowires
• Manipulating Majorana zero modes in double quantum dots
• Pinning of Andreev bound states to zero energy in two-dimensional superconductor-semiconductor Rashba heterostructures
• Absence of supercurrent sign reversal in a topological junction with a quantum dot
• Transport signatures of Majorana bound states in superconducting hybrid structures
• Majorana-like localized spin density without bound states in topologically trivial spin-orbit coupled nanowires
• Charge and spin transport through normal lead coupled to $s$-wave superconductor and a Majorana zero mode
• Accessing the degree of Majorana nonlocality in a quantum dot-optical microcavity system
• Topological isoconductance signatures in Majorana nanowires
• Reshaping the Jaynes-Cummings ladder with Majorana bound states
• Non-Abelian Anyons and Non-Abelian Vortices in Topological Superconductors
• Transport signatures of topological phases in double nanowires probed by spin-polarized STM
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• Majorana-Kondo competition in a cross-shaped double quantum dot-topological superconductor system
• Josephson current signature of Floquet Majorana and topological accidental zero modes in altermagnet heterostructures
• Majorana Zero Modes in Cylindrical Semiconductor Quantum Wire
• Enhanced $2\pi$-periodic Aharonov-Bohm Effect as a Signature of Majorana Zero Modes Probed by Nonlocal Measurements
• Nonlocal correlations transmitted between quantum dots via short topological superconductor
• Photonic cross-noise spectroscopy of Majorana bound states
• Fractionalization of Majorana-Ising-type quasiparticles
• Confinement versus interface bound states in spin-orbit coupled nanowires
• Revisiting the Poor Man's Majoranas: The Spin-Exchange Induced Spillover Effect
• Confinement-induced zero-bias peaks in conventional superconductor hybrids
• Equivalence between a topological and non-topological quantum dot - hybrid structures
• Interplay of correlations and Majorana mode from local solution perspective
• Majorana Bound State leakage to impurity in Su-Schrieffer-Heeger-Rashba scenario