Disorder-independent topological superconductor realized by antiferromagnetic Rashba nanowires with superconducting proximity effect
College of Sciences, Northeastern University, 110819, Shenyang, China
2 School of Physics and Technology, University of Jinan, 250022, Jinan, China
Accepted: 13 July 2022
Published online: 18 August 2022
We theoretically investigate the topological phase transition of the antiferromagnetic Rashba nanowire, by considering it to be subject to the superconducting proximity effect and longitudinal magnetic field. We see that the antiferromagnetic order enriches the topological superconducting phase transition and causes Majorana bound states (MBSs) to form in more parameter regions, compared to the normal Rashba nanowire. Even in the absence of magnetic field, antiferromagnetic order can also induce the formation of MBSs through introducing the alternative phase transition manner. More importantly, the antiferromagnetic-induced MBSs can be less influenced by the perturbation of parameter disorders, including the intersite couplings and AFM order of the nanowire. Their signature is still robust when the MBSs contributed by the uniform magnetic field are destroyed by disorders. We then believe that the findings in this work can be helpful in utilizing antiferromagnetic nanowires to experimentally achieve the MBSs for future topological quantum computation.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.