Spectroscopy of the superconducting proximity effect in nanowires using integrated quantum dots
arXiv:1812.06850 · doi:10.1038/s42005-019-0162-4
Abstract
The superconducting proximity effect has been the focus of significant research efforts over many years and has recently attracted renewed interest as the basis of topologically non-trivial states in materials with a large spin orbit interaction, with protected boundary states useful for quantum information technologies. However, spectroscopy of these states is challenging because of the limited spatial and energetic control of conventional tunnel barriers. Here, we report electronic spectroscopy measurements of the proximity gap in a semiconducting indium arsenide (InAs) nanowire (NW) segment coupled to a superconductor (SC), using a spatially separated quantum dot (QD) formed deterministically during the crystal growth. We extract the characteristic parameters describing the proximity gap which is suppressed for lower electron densities and fully developed for larger ones. This gate-tunable transition of the proximity effect can be understood as a transition from the long to the short junction regime of subgap bound states in the NW segment. Our device architecture opens up the way to systematic, unambiguous spectroscopy studies of subgap bound states, such as Majorana bound states.
References in corpus (34)
- Non-Abelian Anyons and Topological Quantum Computation
- Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
- Non-Abelian statistics and topological quantum information processing in 1D wire networks
- Exponential Protection of Zero Modes in Majorana Islands
- Majorana bound states in a coupled quantum-dot hybrid-nanowire system
- Spin-resolved Andreev levels and parity crossings in hybrid superconductor-semiconductor nanostructures
- Quantized Majorana conductance
- Epitaxy of Semiconductor-Superconductor nanowires
- Tunable Supercurrent Through Semiconductor Nanowires
- Supercurrent reversal in quantum dots
- Andreev bound states versus Majorana bound states in quantum dot-nanowire-superconductor hybrid structures: Trivial versus topological zero-bias conductance peaks
- Hard gap in epitaxial semiconductor-superconductor nanowires
- Electron Cotunneling in a Semiconductor Quantum Dot
- Near-unity Cooper pair splitting efficiency
- Resonant tunneling through a small quantum dot coupled to superconducting leads
- Zero-energy Andreev bound states from quantum dots in proximitized Rashba nanowires
- Soft Superconducting Gap in Semiconductor Majorana Nanowires
- Scheme to measure Majorana fermion lifetimes using a quantum dot
- Kondo-Enhanced Andreev Tunneling in InAs Nanowire Quantum Dots
- Tuning Yu-Shiba-Rusinov States in a Quantum Dot
- Andreev bound states probed in three-terminal quantum dots
- Spin-dependent coupling between quantum dots and topological quantum wires
- Proximity effect between two superconductors spatially resolved by scanning tunneling spectroscopy
- Energy gap measurement of nanostructured thin aluminium films for use in single Cooper-pair devices
- Topological Phase Detection in Rashba Nanowires with a Quantum Dot
- Single-electron transport in InAs nanowire quantum dots formed by crystal phase engineering
- Nanoscale spin rectifiers controlled by the Stark effect
- Resonant and inelastic Andreev tunneling observed on a carbon nanotube quantum dot
- Andreev reflection versus Coulomb blockade in hybrid semiconductor nanowire devices
- Readout of Majorana parity states using a quantum dot
- Phenomenology of soft gap, zero bias peak, and zero mode splitting in ideal Majorana nanowires
- Subgap resonant quasiparticle transport in normal-superconductor quantum dot devices
- Tuning the two-electron hybridization and spin states in parallel-coupled InAs quantum dots
- Metamorphosis and Taxonomy of Andreev Bound States
Cited by in corpus (29)
- From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires
- Nontopological zero-bias peaks in full-shell nanowires induced by flux tunable Andreev states
- Magnetic field independent sub-gap states in hybrid Rashba nanowires
- A Double Quantum Dot Spin Valve
- Zeeman tunability of Andreev bound states in van-der-Waals tunnel barriers
- Spectroscopy of using Energy-Tunable Defect-Embedded Quantum Dots
- Progress in superconductor-semiconductor topological Josephson junctions
- Superconducting contacts to a monolayer semiconductor
- Quantum-Dot Assisted Spectroscopy of Degeneracy-Lifted Landau Levels in Graphene
- Orbital Tuning of Tunnel Coupling in InAs/InP Nanowire Quantum Dots
- Highly symmetric and tunable tunnel couplings in InAs/InP nanowire heterostructure quantum dots
- Dynamical leakage of Majorana mode into side-attached quantum dot
- Nonlocal measurement of quasiparticle charge and energy relaxation in proximitized semiconductor nanowires using quantum dots
- Magnetically-Confined Bound States in Rashba Systems
- Spin-resolved spectroscopy using a quantum dot defined in InAs 2DEG
- Intermediate states in Andreev bound state fusion
- Spin-filtered measurements of Andreev bound states
- InAs/MoRe hybrid semiconductor/superconductor nanowire devices
- Transport signatures of topological phases in double nanowires probed by spin-polarized STM
- Spectroscopy of the local density-of-states in nanowires using integrated quantum dots
- Dephasing in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator
- Spin-1 Haldane chains of superconductor-semiconductor hybrids
- All-electrical spectroscopy of topological phases in semiconductor-superconductor heterostructures
- Fate of the superconducting state in floating islands of hybrid nanowire devices
- Solution of master equations by fermionic-duality: Time-dependent charge and heat currents through an interacting quantum dot proximized by a superconductor
- Probing proximity induced superconductivity in InAs nanowire using built-in barriers
- Quench dynamics of Fano-like resonances in the presence of the on-dot superconducting pairing
- Spectroscopic Visualization of Hard Quasi-1D Superconductivity Induced in Nanowires Deposited on a Quasi-2D Indium film
- Electron-hole coherence in core-shell nanowires with partial proximity induced superconductivity