Majorana dc Josephson current mediated by a quantum dot

@article{Xu2016MajoranaDJ,
  title={Majorana dc Josephson current mediated by a quantum dot},
  author={Luting Xu and Xin-Qi Li and Qing-feng Sun},
  journal={Journal of Physics: Condensed Matter},
  year={2016},
  volume={29}
}
The Josephson supercurrent through a hybrid Majorana-quantum dot-Majorana junction is investigated. We particularly analyze the effect of spin-selective coupling between the Majorana and quantum dot states, which only emerges in the topological phase and will influence the current through bent junctions and/or in the presence of magnetic fields in the quantum dot. We find that the characteristic behavior of the supercurrent through this system is quite counterintuitive, differing remarkably… 

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References

SHOWING 1-10 OF 47 REFERENCES

Josephson ϕ0-junction in nanowire quantum dots

The Josephson effect describes supercurrent flowing through a junction connecting two superconducting leads by a thin barrier. This current is driven by a superconducting phase difference ϕ between

Tunnel spectroscopy of Majorana bound states in topological superconductor/quantum dot Josephson junctions

We theoretically investigate electronic transport through a junction where a quantum dot (QD) is tunnel coupled on both sides to semiconductor nanowires with strong spin-orbit interaction and

Detection of a Majorana fermion zero mode by a T-shaped quantum-dot structure

We investigate the electron transport through the T-shaped quantum-dot (QD) structure theoretically, by coupling a Majorana zero mode to the terminal QD. It is found that in the double-QD

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

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.

Identifying the topological superconducting phase in a multiband quantum wire

How to distinguish the zero-bias peak (ZBP) caused by the Majorana fermions from that by the other effects remains a challenge in detecting the topological order of a quantum wire. In this paper we

Direct coupling between magnetism and superconducting current in the Josephson phi0 junction.

The proposed mechanism of the phi{0} junction formation gives a direct coupling between the superconducting current and the magnetic moment in the weak link, which opens interesting perspectives for the superconductor spintronics.

Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device

We report on the observation of excitation of Majorana fermions in a Nb-InSb nanowire quantum dot-Nb hybrid system. The InSb nanowire quantum dot is formed between the two Nb contacts by weak

Zero-bias peaks in the tunneling conductance of spin-orbit-coupled superconducting wires with and without Majorana end-states.

It is shown that this system generically exhibits a (nonquantized) zero-bias peak even when the wire is topologically trivial and does not possess Majorana end states, by simulating the tunneling conductance for multiband wires with realistic amounts of disorder.

Majorana Zero Mode Detected with Spin Selective Andreev Reflection in the Vortex of a Topological Superconductor.

Recently, theory has predicted a Majorana zero mode (MZM) to induce spin selective Andreev reflection (SSAR), a novel magnetic property which can be used to detect the MZM. Here, spin-polarized

Majorana fermion induced resonant Andreev reflection.

We describe experimental signatures of Majorana fermion edge states, which form at the interface between a superconductor and the surface of a topological insulator. If a lead couples to the Majorana