Decays of Majorana or Andreev oscillations induced by steplike spin-orbit coupling

Haizhou Lu

doi:10.1117/12.2566625

20 August 2020 Decays of Majorana or Andreev oscillations induced by steplike spin-orbit coupling

Haizhou Lu

Proceedings Volume 11470, Spintronics XIII; 114700M (2020) https://doi.org/10.1117/12.2566625
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

The Majorana zero mode in the semiconductor-superconductor nanowire is one of the promising candidates for topological quantum computing. Recently, in islands of nanowires, subgap-state energies have been experimentally observed to oscillate as a function of the magnetic field, showing a signature of overlapped Majorana bound states. However, the oscillation amplitude either dies away after an overshoot or decays, sharply opposite to the theoretically predicted enhanced oscillations for Majorana bound states. We reveal that a steplike distribution of spin-orbit coupling in realistic devices can induce the decaying Majorana oscillations, resulting from the coupling-induced energy repulsion between the quasiparticle spectra on the two sides of the step. Our work will inspire more works to reexamine effects of the nonuniform spin-orbit coupling, which is generally present in experimental devices.

Conference Presentation

Citation Download Citation

Haizhou Lu "Decays of Majorana or Andreev oscillations induced by steplike spin-orbit coupling", Proc. SPIE 11470, Spintronics XIII, 114700M (20 August 2020); https://doi.org/10.1117/12.2566625

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