# Microwave spectroscopy of spinful Andreev bound states in ballistic semiconductor Josephson junctions

@article{Woerkom2017MicrowaveSO, title={Microwave spectroscopy of spinful Andreev bound states in ballistic semiconductor Josephson junctions}, author={David J. van Woerkom and Alex Proutski and Bernard van Heck and Dani{\"e}l Bouman and Jukka I. Vayrynen and Leonid I. Glazman and Peter Krogstrup and Jesper Nygaard and Leo P Kouwenhoven and Attila Geresdi}, journal={Nature Physics}, year={2017}, volume={13}, pages={876-881} }

The superconducting proximity effect in semiconductor nanowires has recently enabled the study of new superconducting architectures, such as gate-tunable superconducting qubits and multiterminal Josephson junctions. As opposed to their metallic counterparts, the electron density in semiconductor nanosystems is tunable by external electrostatic gates, providing a highly scalable and in situ variation of the device properties. In addition, semiconductors with large g-factor and spin–orbit…

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## References

SHOWING 1-10 OF 41 REFERENCES

Exciting Andreev pairs in a superconducting atomic contact

- PhysicsNature
- 2013

The Josephson effect is established through spectroscopic measurements of superconducting atomic contacts, which depend on the atomic configuration and on the phase difference between the superconductors, are in complete agreement with theory.

Coherent manipulation of Andreev states in superconducting atomic contacts

- PhysicsScience
- 2015

This work demonstrates the coherent manipulation of a quantum system based on Andreev bound states, which are microscopic quasi-particle states inherent to superconducting weak links, using a circuit quantum electrodynamics setup.

Semiconductor-Nanowire-Based Superconducting Qubit.

- PhysicsPhysical review letters
- 2015

A hybrid qubit based on a semiconductor nanowire with an epitaxially grown superconductor layer and the absence of flux control allows operation in a magnetic field, relevant for topological quantum information is introduced.

Tunneling spectroscopy of quasiparticle bound states in a spinful Josephson junction.

- PhysicsPhysical review letters
- 2013

Subgap resonances for odd electron occupancy-interpreted as bound states involving a confined electron and a quasiparticle from the superconducting leads, reminiscent of Yu-Shiba-Rusinov states-evolve into Kondo-related resonances at higher magnetic fields.

Majorana fermions and a topological phase transition in semiconductor-superconductor heterostructures.

- PhysicsPhysical review letters
- 2010

The measurement of the supercurrent through the junction allows one to discern topologically distinct phases and observe a topological phase transition by simply changing the in-plane magnetic field or the gate voltage, which will be a direct demonstration of the existence of Majorana particles.

Josephson Current through Semiconductor Nanowire with Spin-Orbit Interaction in Magnetic Field

- Physics
- 2013

We theoretically study the DC Josephson effect of a semiconductor nanowire (NW) with a strong spin–orbit interaction when a magnetic field is applied parallel to the NW. We adopt a model of single…

Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices

- PhysicsScience
- 2012

Electrical measurements on indium antimonide nanowires contacted with one normal (gold) and one superconducting (niobium titanium nitride) electrode support the hypothesis of Majorana fermions in Nanowires coupled to superconductors.

Epitaxy of semiconductor-superconductor nanowires.

- Physics, Materials ScienceNature materials
- 2015

The grain growth kinetics of the metal phase is formulated in general terms of continuum parameters and bicrystal symmetries and seems to solve the soft-gap problem in superconducting hybrid structures.

Chiral symmetry breaking and the Josephson current in a ballistic superconductor–quantum wire–superconductor junction

- Physics
- 2004

We evaluate the Josephson current through a quasi-1D quantum wire coupled to bulk superconductors. It is shown that the interplay of Rashba spin-orbit interaction and Zeeman splitting results in the…

Tunable Supercurrent Through Semiconductor Nanowires

- PhysicsScience
- 2005

Nanoscale supercond conductor/semiconductor hybrid devices are assembled from indium arsenide semiconductor nanowires individually contacted by aluminum-based superconductor electrodes, which form superconducting weak links operating as mesoscopic Josephson junctions with electrically tunable coupling.