Signature of a pair of Majorana zero modes in superconducting gold surface states

@article{Manna2020SignatureOA,
  title={Signature of a pair of Majorana zero modes in superconducting gold surface states},
  author={Sujit Manna and Peng Wei and Yingming Xie and Kam Tuen Law and Patrick A. Lee and Jagadeesh S. Moodera},
  journal={Proceedings of the National Academy of Sciences},
  year={2020},
  volume={117},
  pages={8775 - 8782}
}
Significance In 1937 Ettore Majorana pointed out that unlike the standard solution of the Dirac equation which led to the electron and its antiparticle, the positron, it is possible to have a solution where the fermionic particle is its own antiparticle. While such a particle remains elusive in particle physics, a pair of localized Majorana states has been predicted to reside at the ends of a specially designed superconducting wire. These Majorana zero modes can form building blocks of qubits… Expand
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  • Physics
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TLDR
It is demonstrated that Fe(Te,Se) can grow epitaxially on a TI (Bi2Te3) layer due to accidental, uniaxial lattice match, which is dubbed as "hybrid symmetry epitaxy", critical to stabilizing robust superconductivity with TC as high as 13 K. Expand
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References

SHOWING 1-10 OF 61 REFERENCES
Observation of Majorana fermions in ferromagnetic atomic chains on a superconductor
TLDR
High-resolution spectroscopic imaging techniques show that the onset of superconductivity, which gaps the electronic density of states in the bulk of the Fe chains, is accompanied by the appearance of zero-energy end-states, providing strong evidence for the formation of a topological phase and edge-bound Majorana fermions in atomic chains. Expand
Isolated pairs of Majorana zero modes in a disordered superconducting lead monolayer
TLDR
Pairs of zero modes are stabilized in the middle and around the magnetic domains in a disordered superconducting Pb monolayer, demonstrating the protected Majorana nature of this zero mode pair and highlighting the role of magnetic or spin-orbit coupling textures. Expand
Exponential protection of zero modes in Majorana islands
TLDR
The results help to explain the trivial-to-topological transition in finite systems and to quantify the scaling of topological protection with end-mode separation. Expand
Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure
TLDR
Transport measurements that suggest the existence of one-dimensional chiral Majorana fermion modes in the hybrid system of a quantum anomalous Hall insulator thin film coupled with a superconductor are reported. Expand
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. Expand
Evidence for Majorana bound states in an iron-based superconductor
TLDR
A sharp zero-bias peak inside a vortex core that does not split when moving away from the vortex center is observed, consistent with the tunneling to a nearly pure MBS, separated from nontopological bound states. Expand
Topological superconductivity in a phase-controlled Josephson junction
TLDR
This work establishes this system as a promising platform for realizing topological superconductivity and for creating and manipulating Majorana modes and probing topologicalsuperconducting phases in two-dimensional systems. Expand
New directions in the pursuit of Majorana fermions in solid state systems.
  • J. Alicea
  • Physics, Medicine
  • Reports on progress in physics. Physical Society
  • 2012
TLDR
This review paper highlights recent advances in the condensed matter search for Majorana that have led many in the field to believe that this quest may soon bear fruit and discusses the most remarkable properties of condensed matter Majorana fermions-the non-Abelian exchange statistics that they generate and their associated potential for quantum computation. Expand
Quantized Majorana conductance
TLDR
The observation of a quantized conductance plateau at 2e2/h in the zero-bias conductance measured in indium antimonide semiconductor nanowires covered with an aluminium superconducting shell strongly supports the existence of Majorana zero-modes in the system. Expand
Topological superconductivity and Majorana fermions in metallic surface states
Heavy metals, such as Au, Ag, and Pb, often have sharp surface states that are split by strong Rashba spin-orbit coupling. The strong spin-orbit coupling and two-dimensional nature of these surfaceExpand
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