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Showing 1–7 of 7 results
Advanced filters: Author: Ewelina M. Hankiewicz Clear advanced filters

  • The quantum spin Hall state is predicted to consist of two oppositely polarized spin currents travelling in opposite directions around the edges of a topological insulator. Non-local measurements of the transport in HgTe quantum wells confirm the polarized nature of these edge states.

    • Christoph Brüne
    • Andreas Roth
    • Shou-Cheng Zhang
    Research
    Nature Physics
    Volume: 8, P: 485-490

  • A topological superconductor is an exotic state of matter that is gapped in the bulk but possesses gapless surface states, but its identification has been so far elusive. Here, the authors develop a theory for scanning tunnelling microscopy which would allow to resolve topological superconductor states.

    • Lars Elster
    • Christian Platt
    • Ewelina M. Hankiewicz
    Research
    Nature Communications
    Volume: 6, P: 1-9

  • Edge states of QSHIs hold promise for future technologies due to protection against backscattering. This work observes that intraband backscattering remains allowed for nonmonotonic edge bands, revealing critical aspects of edge state stability.

    • Jonas Erhardt
    • Mattia Iannetti
    • Ralph Claessen
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-7

  • Majorana bound states are created in a two-dimensional architecture by confining Majorana channels within a planar Josephson junction, using the phase difference across the junction and an in-plane magnetic field.

    • Hechen Ren
    • Falko Pientka
    • Amir Yacoby
    Research
    Nature
    Volume: 569, P: 93-98

  • Topological superconductors are expected to be a key component of quantum computing systems but reliably detecting their exotic properties is a challenge. Here, the authors propose a topological Josephson heat engine which uses thermodynamic effects to probe the 4π-periodic ground state of a topological superconductor.

    • Benedikt Scharf
    • Alessandro Braggio
    • Ewelina M. Hankiewicz
    ResearchOpen Access
    Communications Physics
    Volume: 3, P: 1-6

  • Non-Hermitian systems can be described in terms of gain and loss with a coupled environment—a hard feature to tune in quantum devices. Now an experiment shows non-Hermitian topology in a quantum Hall ring without relying on gain and loss.

    • Kyrylo Ochkan
    • Raghav Chaturvedi
    • Ion Cosma Fulga
    ResearchOpen Access
    Nature Physics
    Volume: 20, P: 395-401

  • The quantum spin Hall effect disappears at high magnetic fields when the band inversion is lifted. The authors demonstrate that in contrast, in disordered samples, counter-propagating topological and quantum Hall edge channels prevent the detection of the trivial gap, explaining a previous observation.

    • Saquib Shamim
    • Pragya Shekhar
    • Laurens W. Molenkamp
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7