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Showing 1–7 of 7 results
Advanced filters: Author: Alexander D. Mirlin Clear advanced filters

  • The boundaries of fractional quantum Hall states can host multiple, interacting one-dimensional edge modes, which test our understanding of strongly interacting systems. Here the authors observe the edge-mode equilibration transition that was predicted for the ν=2/3 fractional quantum Hall state.

    • Yonatan Cohen
    • Yuval Ronen
    • Vladimir Umansky
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-6

  • Quantum Hall ferromagnets can host magnons, collective spin-wave excitations, which have possible uses in spin-wave based information processing. Detecting these excitations electrically can be challenging. Here, Kumar, Srivastav, Roy, Park and coauthors demonstrate a noise-based approach to detecting magnons.

    • Ravi Kumar
    • Saurabh Kumar Srivastav
    • Anindya Das
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-9

  • The knowledge of quantum numbers of the edge modes is essential for understanding fractional Hall states containing counter-propagating downstream and upstream modes. Here the authors identify the edge quantum numbers by probing a crossover from non-equilibrated to equilibrated edge mode regime in thermal conductance.

    • Saurabh Kumar Srivastav
    • Ravi Kumar
    • Anindya Das
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-8

  • The transport behaviour of counter-propagating edge modes in the hole-conjugate fractional quantum Hall state is not fully understood. Here, by combining local noise thermometry and thermal conductance measurements, the authors show the absence of thermal equilibration on the edge at macroscopic distances.

    • Ron Aharon Melcer
    • Bivas Dutta
    • Vladimir Umansky
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • Recently graphene has emerged as a new platform for the study of quantum Hall states. Here, by means of noise measurements, the authors report evidence for the existence of the upstream mode and its ballistic nature in the hole-conjugate fractional quantum Hall state in a bilayer graphene device.

    • Ravi Kumar
    • Saurabh Kumar Srivastav
    • Anindya Das
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • The superconductor–insulator phase transition is a quantum phenomenon that reveals a competition between the superconducting phase order and charge localization. Now, microwave spectroscopy is shown to be a promising approach to investigate this effect in controllable one-dimensional Josephson arrays.

    • Alexander D. Mirlin
    • Ivan V. Protopopov
    News & Views
    Nature Physics
    Volume: 15, P: 880-881