InP/GaSb core-shell nanowires: a novel hole-based platform with strong spin-orbit coupling for full-shell hybrid devices

Abstract

Full-shell hybrid nanowires (NWs), structures comprising a superconductor shell that encapsulates a semiconductor (SM) core, have attracted considerable attention in the search for Majorana zero modes (MZMs). However, the predicted Rashba spin-orbit coupling (SOC) in the SM is too small to achieve substantial topological minigaps. In addition, the SM wavefunction spreads all across the section of the nanowire, leading typically to a finite background of trivial subgap states with which MZMs may coexist. To overcome both problems, we explore the advantages of utilizing core-shell hole-band NWs as the SM part of a full-shell hybrid, with an insulating core and an active SM shell. In particular, we consider InP/GaSb core-shell NWs, which allow to exploit the unique characteristics of the III-V compound SM valence bands. We demonstrate that they exhibit a robust hole SOC that emerges from the combination of the intrinsic spin-orbit interaction of the SM active shell and the confinement effects of the nanostructure, thus depending mainly on SM and geometrical parameters. In other words, the SOC is intrinsic and does not rely on red electric fields, which are non-tunable in a full-shell hybrid geometry. As a result, core-shell SM hole-band NWs are found to be a promising candidate to explore Majorana physics in full-hell hybrid devices, addressing several challenges in the field.

32 pages, 4 figures; Resubmission to SciPost with minor changes

References in corpus (62)

• Unpaired Majorana fermions in quantum wires
• Helical liquids and Majorana bound states in quantum wires
• A generic new platform for topological quantum computation using semiconductor heterostructures
• Majorana Zero Modes and Topological Quantum Computation
• Realizing Majorana zero modes in superconductor-semiconductor heterostructures
• Milestones toward Majorana-based quantum computing
• From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires
• A Semiconductor Nanowire-Based Superconducting Qubit
• A four-qubit germanium quantum processor
• The germanium quantum information route
• Zero-voltage conductance peak from weak antilocalization in a Majorana nanowire
• Ge/Si nanowire mesoscopic Josephson junctions
• Fast two-qubit logic with holes in germanium
• Ge hole spin qubit
• Physical mechanisms for zero-bias conductance peaks in Majorana nanowires
• Strong Spin-Orbit Interaction and Helical Hole States in Ge/Si Nanowires
• Topological superconductivity in full shell proximitized nanowires
• Flux-induced Majorana modes in full-shell nanowires
• Flux-induced topological superconductivity in full-shell nanowires
• A single-hole spin qubit
• The 2021 Quantum Materials Roadmap
• A singlet triplet hole spin qubit in planar Ge
• Nontopological zero-bias peaks in full-shell nanowires induced by flux tunable Andreev states
• Gate-controlled quantum dots and superconductivity in planar germanium
• Effects of gate-induced electric fields on semiconductor Majorana nanowires
• Direct Rashba spin-orbit interaction in Si and Ge nanowires with different growth directions
• Hybridization at superconductor-semiconductor interfaces
• Strong and Tunable Spin-Orbit Coupling of One-Dimensional Holes in Ge/Si Core/Shell Nanowires
• Estimating disorder and its adverse effects in semiconductor Majorana nanowires
• Metallization of Rashba wire by superconducting layer in the strong-proximity regime
• Strong spin-orbit interaction and $g$-factor renormalization of hole spins in Ge/Si nanowire quantum dots
• Majorana Fermions in Ge/Si Hole Nanowires
• On the nature of tunable hole g-factors in quantum dots
• Hard superconducting gap in germanium
• Antilocalization of Coulomb Blockade in a Ge-Si Nanowire
• Electric-field dependent g-factor anisotropy in Ge-Si core-shell nanowire quantum dots
• Finite-size effects in a nanowire strongly coupled to a thin superconducting shell
• Disorder effects on Majorana zero modes: Kitaev chain versus semiconductor nanowire
• Spin-orbit interaction and induced superconductivity in an one-dimensional hole gas
• MBE Growth of Al/InAs and Nb/InAs Superconducting Hybrid Nanowire Structures
• Electronic structure of full-shell InAs/Al hybrid semiconductor-superconductor nanowires: Spin-orbit coupling and topological phase space
• Josephson effect in a few-hole quantum dot
• Even-odd effect and Majorana states in full-shell nanowires
• Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer
• Hole spin qubits in thin curved quantum wells
• Conditions for fully gapped topological superconductivity in topological insulator nanowires
• On-demand large-conductance in trivial zero-bias tunneling peaks in Majorana nanowires
• Theory of Caroli-de Gennes-Matricon analogs in full-shell hybrid nanowires
• Growth and Strain Relaxation Mechanisms of InAs/InP/GaAsSb Core-Dual-Shell Nanowires
• Mitigating disorder-induced zero-energy states in weakly-coupled semiconductor-superconductor hybrid systems
• Majorana zero modes in gate-defined germanium hole nanowires
• Enhanced Rashba spin-orbit coupling in core-shell nanowires by the interfacial effect
• Majorana bound states in germanium Josephson junctions via phase control
• Metallization and proximity superconductivity in topological insulator nanowires
• Improved effective equation for the Rashba spin-orbit coupling in semiconductor nanowires
• Phenomenology of Majorana zero modes in full-shell hybrid nanowires
• Fluxoid-induced pairing suppression and near-zero modes in quantum dots coupled to full-shell nanowires
• Exporting superconductivity across the gap: Proximity effect for semiconductor valence-band states due to contact with a simple-metal superconductor
• Microscopic analysis of proximity-induced superconductivity and metallization effects in superconductor-germanium hole nanowires
• Band structure of n- and p-doped core-shell nanowires
• Germanium-based hybrid semiconductor-superconductor topological quantum computing platforms: Disorder effects
• High quality CVD deposition of Ge layers for Ge/SiGe Quantum Well heterostructures

Cited by in corpus (5)

• Josephson effect and critical currents in trivial and topological full-shell hybrid nanowires
• Fluxoid valve effect in full-shell nanowire Josephson junctions
• Phase-controlled minimal Kitaev chain in multiterminal Josephson junctions
• Absence of Quasi-Majorana False Positives in Full-Shell Hybrid Nanowires
• Fluxoid solitons in superconducting tapered tubes and bottlenecks