Large even-odd spacing and $g$-factor anisotropy in PbTe quantum dots

Abstract

PbTe is a semiconductor with promising properties for topological quantum computing applications. Here we characterize quantum dots in PbTe nanowires selectively grown on InP. Charge stability diagrams at zero magnetic field reveal large even-odd spacing between Coulomb blockade peaks, charging energies below 140$\mu \mathrm{eV}$ and Kondo peaks in odd Coulomb diamonds. We attribute the large even-odd spacing to the large dielectric constant and small effective electron mass of PbTe. By studying the Zeeman-induced level and Kondo splitting in finite magnetic fields, we extract the electron $g$-factor as a function of magnetic field direction. We find the $g$-factor tensor to be highly anisotropic, with principal $g$-factors ranging from 0.9 to 22.4, and to depend on the electronic configuration of the devices. These results indicate strong Rashba spin-orbit interaction in our PbTe quantum dots.

References in corpus (24)

• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Helical liquids and Majorana bound states in quantum wires
• Spins in few-electron quantum dots
• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• Realizing Majorana zero modes in superconductor-semiconductor heterostructures
• From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires
• Zeeman energy and spin relaxation in a one-electron quantum dot
• Direct Measurement of the Spin-Orbit Interaction in a Two-Electron InAs Nanowire Quantum Dot
• Electron Cotunneling in a Semiconductor Quantum Dot
• Tunable effective g-factor in InAs nanowire quantum dots
• Giant fluctuations and gate control of the g-factor in InAs Nanowire Quantum Dots
• Anomalous magnetic splitting of the Kondo resonance
• Epitaxial Pb on InAs nanowires
• Kondo physics in tunable semiconductor nanowire quantum dots
• Resonant tunnelling features in the transport spectroscopy of quantum dots
• Electrical control of the $g$-tensor of a single hole in a silicon MOS quantum dot
• In-plane selective area InSb-Al nanowire quantum networks
• Fluctuating spin g-tensor in small metal grains
• 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
• Spin and Orbital Spectroscopy in the Absence of Coulomb Blockade in Lead Telluride Nanowire Quantum Dots
• $g$-factor anisotropy in nanowire-based InAs quantum dots
• Measurements of anisotropic g-factors for electrons in InSb nanowire quantum dots

Cited by in corpus (21)

• Conductance Quantization in PbTe Nanowires
• Proximity effect in PbTe-Pb hybrid nanowire Josephson junctions
• Ballistic PbTe Nanowire Devices
• Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices
• Hard superconducting gap in PbTe nanowires
• Evidence for $\pi$-shifted Cooper quartets and few-mode transport in PbTe nanowire three-terminal Josephson junctions
• Cryogenic Multiplexing with Bottom-Up Nanowires
• Gate-tunable subband degeneracy in semiconductor nanowires
• Reducing disorder in PbTe nanowires for Majorana research
• SQUID oscillations in PbTe nanowire networks
• Quantized Andreev conductance in semiconductor nanowires
• Anisotropy of PbTe nanowires with and without a superconductor
• Enhanced superconductivity in PbTe-In hybrids
• Transport in Single Quantum Dots: A Review from Linear Response to Nonlinear Regimes
• Theory for electron and hole fine structure and Landé g-factors in lead chalcogenide nanowires
• Statistical Reproducibility of Selective Area Grown InAs Nanowire Devices
• Ab initio study of Proximity-Induced Superconductivity in PbTe/Pb heterostructures
• Strong enhancement of g-factor in PbTe-Pb hybrid nanowires
• Presence versus absence of charging energies in PbTe quantum dots
• Gate-tunable superconductor-semiconductor coupling and its impact on zero-energy modes in PbTe-Pb nanowires
• Growth and fabrication of advanced PbTe-Pb quantum devices