# Perfect Crossed Andreev Reflection in Dirac Hybrid Junctions in the Quantum Hall Regime.

@article{Zhang2019PerfectCA, title={Perfect Crossed Andreev Reflection in Dirac Hybrid Junctions in the Quantum Hall Regime.}, author={Song-Bo Zhang and Bj{\"o}rn Trauzettel}, journal={Physical review letters}, year={2019}, volume={122 25}, pages={ 257701 } }

Perfect crossed Andreev reflection (CAR) is striking for high-efficiency Cooper pair splitting, which bears promising applications in quantum communication. Recent experimental advances have disclosed the way to explore CAR in Dirac fermion systems under ultrastrong magnetic fields. We develop a scattering approach to study quantum-Hall-superconductor-quantum-Hall junctions formed by a two-dimensional time-reversal symmetric Dirac semimetal. We propose two different setups of the hybrid…

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## References

SHOWING 1-10 OF 80 REFERENCES

### Topological π Junctions from Crossed Andreev Reflection in the Quantum Hall Regime.

- PhysicsPhysical review letters
- 2018

It is shown that, in the presence of spin-orbit coupling, contacting the 2DEG with a narrow strip of an s-wave superconductor produces a topological superconducting gap along the contact as a result of crossed Andreev reflection (CAR) processes across the strip.

### Inter-Landau-level Andreev Reflection at the Dirac Point in a Graphene Quantum Hall State Coupled to a NbSe_{2} Superconductor.

- PhysicsPhysical review letters
- 2018

The principal finding is the observation of an anomalous finite-temperature conductance peak located precisely at the Dirac point, providing a definitive evidence for inter-Landau-level Andreev reflection in a quantum Hall system.

### Crossed Andreev effects in two-dimensional quantum Hall systems

- Physics
- 2016

We study the crossed Andreev effects in two-dimensional conductor/superconductor hybrid systems under a perpendicular magnetic field. Both a graphene/superconductor hybrid system and an electron…

### Toward Quantum Hall Effect in a Josephson Junction

- Physicsphysica status solidi (RRL) - Rapid Research Letters
- 2018

Hybrid superconductor/semiconductor devices constitute a powerful platform where intriguing topological properties can be investigated. Here, we present fabrication methods and analysis of Josephson…

### Spin-filtered and spatially distinguishable crossed Andreev reflection in a silicene-superconductor junction

- Physics
- 2016

We theoretically investigate the quantum transports in a junction between a superconductor and a silicene nanoribbon, under the effect of a magnetic exchange field. We find that for a narrow…

### Supercurrent in the quantum Hall regime

- PhysicsScience
- 2016

The observation of a supercurrent in the QH regime marks an important step in the quest for exotic topological excitations, such as Majorana fermions and parafermions, which may find applications in fault-tolerant quantum computing.

### Proposal for an all-electrical detection of crossed Andreev reflection in topological insulators.

- PhysicsPhysical review letters
- 2013

A generalized wave matching method is used and it is found that for systems narrow enough so that the bulk states in the SC part couple both edges, the crossed Andreev reflection (CAR) is significant and the electron cotunneling and CAR become spatially separated.

### Nonlocal superconducting correlations in graphene in the quantum Hall regime

- Physics
- 2018

We study Andreev processes and nonlocal transport in a three-terminal graphene-superconductor hybrid system under a quantizing perpendicular magnetic field [G.-H. Lee et al., Nat. Phys. 13, 693…

### Magnetic Field Tuning and Quantum Interference in a Cooper Pair Splitter.

- PhysicsPhysical review letters
- 2015

It is demonstrated that the electrons from a Cooper pair splitter can propagate coherently after their emission from the superconductor and how a magnetic field can be used to optimize the performance of a CPS device.

### Andreev reflection of helical edge modes in InAs/GaSb quantum spin Hall insulator.

- PhysicsPhysical review letters
- 2012

We present an experimental study of S-N-S junctions, with N being a quantum spin Hall insulator made of InAs/GaSb. A front gate is used to vary the Fermi level into the minigap, where helical edge…