Anisotropy of PbTe nanowires with and without a superconductor

Abstract

We investigate the anisotropic behaviors in PbTe and PbTe-Pb hybrid nanowires. In previous studies on PbTe, wire-to-wire variations in anisotropy indicate poor device control, posing a serious challenge for applications. Here, we achieve reproducible anisotropy in PbTe nanowires through a substantial reduction of disorder. We then couple PbTe to a superconductor Pb, and observe a pronounced deviation in the anisotropy behavior compared to bare PbTe nanowires. This deviation is gate-tunable and attributed to spin-orbit interaction and orbital effect, controlled by charge transfer between Pb and PbTe. These results provide a guidance for the controlled engineering of exotic quantum states in this hybrid material platform.

References in corpus (27)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Majorana bound states in a coupled quantum-dot hybrid-nanowire system
• Transport spectroscopy of NS nanowire junctions with Majorana fermions
• Towards a realistic transport modeling in a superconducting nanowire with Majorana fermions
• Realization of a minimal Kitaev chain in coupled quantum dots
• InAs-Al Hybrid Devices Passing the Topological Gap Protocol
• Disorder-induced zero-bias peaks in Majorana nanowires
• Estimating disorder and its adverse effects in semiconductor Majorana nanowires
• Plateau regions for zero-bias peaks within 5% of the quantized conductance value $2e^2/h$
• Trivial Andreev band mimicking topological bulk gap reopening in the non-local conductance of long Rashba nanowires
• Large zero bias peaks and dips in a four-terminal thin InAs-Al nanowire device
• Selective area epitaxy of PbTe-Pb hybrid nanowires on a lattice-matched substrate
• Numerical study of PbTe-Pb hybrid nanowires for engineering Majorana zero modes
• Partially-separated Majorana modes in a disordered medium
• Large even-odd spacing and $g$-factor anisotropy in PbTe quantum dots
• Conductance Quantization in PbTe Nanowires
• Proximity effect in PbTe-Pb hybrid nanowire Josephson junctions
• Observation of Aharonov-Bohm effect in PbTe nanowire networks
• Ballistic PbTe Nanowire Devices
• Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices
• Spin and Orbital Spectroscopy in the Absence of Coulomb Blockade in Lead Telluride Nanowire Quantum Dots
• Evidence for $\pi$-shifted Cooper quartets and few-mode transport in PbTe nanowire three-terminal Josephson junctions
• Hard superconducting gap in PbTe nanowires
• Gate-tunable subband degeneracy in semiconductor nanowires
• SQUID oscillations in PbTe nanowire networks
• Reducing disorder in PbTe nanowires for Majorana research

Cited by in corpus (2)

• Strong enhancement of g-factor in PbTe-Pb hybrid nanowires
• Presence versus absence of charging energies in PbTe quantum dots