Spin-filtered measurements of Andreev bound states
arXiv:2212.10241 · doi:10.1038/s41467-023-42026-7
Abstract
A semiconductor nanowire brought in proximity to a superconductor can form discrete, particle-hole symmetric states, known as Andreev bound states (ABSs). An ABS can be found in its ground or excited states of different spin and parity, such as a spin-zero singlet state with an even number of electrons or a spin-1/2 doublet state with an odd number of electrons. Considering the difference between spin of the even and odd states, spin-filtered measurements have the potential to reveal the underlying ground state. To directly measure the spin of single-electron excitations, we probe an ABS using a spin-polarized quantum dot that acts as a bipolar spin filter, in combination with a non-polarized tunnel junction in a three-terminal circuit. We observe a spin-polarized excitation spectrum of the ABS, which in some cases is fully spin-polarized, despite the presence of strong spin-orbit interaction in the InSb nanowires. In addition, decoupling the hybrid from the normal lead blocks the ABS relaxation resulting in a current blockade where the ABS is trapped in an excited state. Spin-polarized spectroscopy of hybrid nanowire devices, as demonstrated here, is proposed as an experimental tool to support the observation of topological superconductivity.
References in corpus (48)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Helical liquids and Majorana bound states in quantum wires
- Spins in few-electron quantum dots
- Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
- Realizing Majorana zero modes in superconductor-semiconductor heterostructures
- Spin-resolved Andreev levels and parity crossings in hybrid superconductor-semiconductor nanostructures
- From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires
- Quantum Dot as Spin Filter and Spin Memory
- Realization of a minimal Kitaev chain in coupled quantum dots
- Distinguishing a Majorana zero mode using spin resolved measurements
- Spin and Majorana polarization in topological superconducting wires
- Physical mechanisms for zero-bias conductance peaks in Majorana nanowires
- InAs-Al Hybrid Devices Passing the Topological Gap Protocol
- Spectral properties of locally correlated electrons in a BCS superconductor
- Zero-energy Andreev bound states from quantum dots in proximitized Rashba nanowires
- Selective Equal-Spin Andreev Reflections Induced by Majorana Fermions
- Suppression of spin relaxation in an InAs nanowire double quantum dot
- Singlet and triplet Cooper pair splitting in hybrid superconducting nanowires
- Pauli Spin Blockade in the Presence of Strong Spin-Orbit Coupling
- Spin and Polarized Current from Coulomb Blockaded Quantum Dots
- Signatures of Majorana Zero Modes in Spin-Resolved Current Correlations
- Conductance-matrix symmetries of a three-terminal hybrid device
- Tuning Yu-Shiba-Rusinov States in a Quantum Dot
- Nonlocal conductance spectroscopy of Andreev bound states: Symmetry relations and BCS charges
- Non-local spectroscopy of Andreev bound states
- Semiconductor few-electron quantum dot operated as a bipolar spin filter
- Spin-polarized Yu-Shiba-Rusinov states in an iron based superconductor
- Andreev bound states probed in three-terminal quantum dots
- Shadow-wall lithography of ballistic superconductor-semiconductor quantum devices
- Magnetic field tuning and quantum interference in a Cooper pair splitter
- Atomic-scale spin-polarization maps using functionalized superconducting probes
- Dimensional crossover in spin-orbit-coupled semiconductor nanowires with induced superconducting pairing
- Spin and Charge Signatures of Topological Superconductivity in Rashba Nanowires
- Magnetic field independent sub-gap states in hybrid Rashba nanowires
- Spectroscopy of the superconducting proximity effect in nanowires using integrated quantum dots
- Boundary spin polarization as robust signature of topological phase transition in Majorana nanowires
- The Andreev states of a superconducting quantum dot: mean field vs exact numerical results
- Nonlocal conductance spectroscopy of Andreev bound states in gate-defined InAs/Al nanowires
- Electrostatic control of the proximity effect in the bulk of semiconductor-superconductor hybrids
- Zeeman tunability of Andreev bound states in van-der-Waals tunnel barriers
- Single-shot fabrication of semiconducting-superconducting nanowire devices
- Magneto-electric spectroscopy of Andreev bound states in Josephson quantum dots
- Spectroscopy of using Energy-Tunable Defect-Embedded Quantum Dots
- Evidence of Andreev blockade in a double quantum dot coupled to a superconductor
- Suppressing quasiparticle poisoning with a voltage-controlled filter
- Subgap resonant quasiparticle transport in normal-superconductor quantum dot devices
- Spin-resolved spectroscopy using a quantum dot defined in InAs 2DEG
- Shiba Bound States across the mobility edge in doped InAs nanowires
Cited by in corpus (7)
- Crossed Andreev reflection and elastic co-tunneling in a three-site Kitaev chain nanowire device
- Charge sensing the parity of an Andreev molecule
- Supercurrent from the imaginary part of the Andreev levels in non-Hermitian Josephson junctions
- Spin-resolved nonlocal transport in proximitized Rashba nanowires
- Revisiting the Poor Man's Majoranas: The Spin-Exchange Induced Spillover Effect
- Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator
- Transient triplet blockade in Andreev junction