Epitaxy of semiconductor-superconductor nanowires.

@article{Krogstrup2015EpitaxyOS,
  title={Epitaxy of semiconductor-superconductor nanowires.},
  author={Peter Krogstrup and N. L. B. Ziino and W. Chang and S. M. Albrecht and Morten Hannibal Madsen and E. Johnson and Jesper Nyg{\aa}rd and Charles M. Marcus and Thomas Sand Jespersen},
  journal={Nature materials},
  year={2015},
  volume={14 4},
  pages={
          400-6
        }
}
Controlling the properties of semiconductor/metal interfaces is a powerful method for designing functionality and improving the performance of electrical devices. Recently semiconductor/superconductor hybrids have appeared as an important example where the atomic scale uniformity of the interface plays a key role in determining the quality of the induced superconducting gap. Here we present epitaxial growth of semiconductor-metal core-shell nanowires by molecular beam epitaxy, a method that… 
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References

SHOWING 1-10 OF 40 REFERENCES
Tunable Supercurrent Through Semiconductor Nanowires
TLDR
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.
Epitaxial core–shell and core–multishell nanowire heterostructures
TLDR
The synthesis of core–multishell structures, including a high-performance coaxially gated field-effect transistor, indicates the general potential of radial heterostructure growth for the development of nanowire-based devices.
Superconducting proximity effect in semiconductor nanowires
We theoretically consider the proximity effect in semiconductor-superconductor hybrid nanostructures, which are being extensively studied in the context of the ongoing search for non-Abelian Majorana
Anomalous zero-bias conductance peak in a Nb-InSb nanowire-Nb hybrid device.
TLDR
It is shown that this zero-bias conductance peak structure in the Nb-InSb nanowire-Nb hybrid quantum device can persist over a large range of applied magnetic fields and could be interpreted as a transport signature of Majorana fermions in the InSb Nanowire.
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
Vertical III-V nanowire device integration on Si(100).
We report complementary metal-oxide-semiconductor (CMOS)-compatible integration of compound semiconductors on Si substrates. InAs and GaAs nanowires are selectively grown in vertical SiO2 nanotube
Soft superconducting gap in semiconductor Majorana nanowires.
TLDR
This work indicates that improving the quality of the superconductor-semiconductor interface should result in a harder induced gap, and systematically studies the effects of magnetic and nonmagnetic disorder, temperature, dissipative Cooper pair breaking, and interface inhomogeneity which could lead to a soft gap.
Self-assembled quantum dots in a nanowire system for quantum photonics.
TLDR
This work presents a versatile quantum-dot-in-nanowire system that reproducibly self-assembles in core-shell GaAs/AlGaAs nanowires and shows that the origin of the optical transitions lies in quantum confinement due to Al-rich barriers.
Majorana fermions and a topological phase transition in semiconductor-superconductor heterostructures.
TLDR
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.
Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices
TLDR
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.
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