Topological superconductivity in a phase-controlled Josephson junction

  title={Topological superconductivity in a phase-controlled Josephson junction},
  author={Hechen Ren and Falko Pientka and Sean Hart and Andrew T. Pierce and Michael Kosowsky and Lukas Lunczer and Raimund Schlereth and Benedikt Scharf and Ewelina M. Hankiewicz and Laurens W. Molenkamp and Bertrand I. Halperin and Amir Yacoby},
Topological superconductors can support localized Majorana states at their boundaries1–5. These quasi-particle excitations obey non-Abelian statistics that can be used to encode and manipulate quantum information in a topologically protected manner6,7. Although signatures of Majorana bound states have been observed in one-dimensional systems, there is an ongoing effort to find alternative platforms that do not require fine-tuning of parameters and can be easily scaled to large numbers of… 

Full proximity treatment of topological superconductors in Josephson-junction architectures

Experiments on planar Josephson junction architectures have recently been shown to provide an alternative way of creating topological superconductors hosting accessible Majorana modes. These

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Majorana nanowires for topological quantum computation

  • P. Marra
  • Physics
    Journal of Applied Physics
  • 2022
Majorana bound states are quasiparticle excitations localized at the boundaries of a topologically nontrivial superconductor. They are zero-energy, charge-neutral, particle–hole symmetric, and

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We investigate the effects of magnetic and crystalline anisotropies on the topological superconducting state of planar Josephson junctions (JJs). In junctions where only Rashba spin-orbit coupling

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Planar Josephson junctions provide a versatile platform, alternative to the nanowire-based geometry, for the generation of the Majorana bound states, due to the additional phase tunability of the



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We consider a two-dimensional electron gas with strong spin-orbit coupling contacted by two superconducting leads, forming a Josephson junction. We show that in the presence of an in-plane Zeeman

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We study multiband semiconducting nanowires proximity coupled with an $s$-wave superconductor and calculate the topological phase diagram as a function of the chemical potential and magnetic field.

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.

Majorana zero modes on a necklace

Non-Abelian quasiparticles have been predicted to exist in a variety of condensed matter systems. Their defining property is that an adiabatic braid between two of them results in a nontrivial change

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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.

Tunnelling spectroscopy of Andreev states in graphene

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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.

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Tuning experiments on semiconductor nanowires coupled to superconductors are performed to establish the zero-bias peak phase in the space of gate voltage and external magnetic field and provide means for Majorana manipulation as required for braiding and topological quantum bits.