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- W2904966776 abstract "The full spatial 3D profile of Majorana bound states (MBS) in a nanowire-like setup featuring a semiconducting carbon nanotube (CNT) as the central element is discussed. By accurate tight-binding calculations we show that the chiral nature of the CNT lattice is imprinted in the MBS wave function which has a helical structure, anisotropic in the transverse direction. The local spin canting angle displays a similar spiral pattern, varying around the CNT circumference. We reconstruct the intricate 3D profile of the MBS wave function analytically, using an effective low energy Hamiltonian accounting both for the electronic spin and valley degrees of freedom of the CNT. We find that the four components of the Majorana spinor are related by the three symmetries of our Bogoliubov-de Gennes (BdG) Hamiltonian, reducing the number of independent components to one. A Fourier transform analysis uncovers the presence of three contributions to the MBS, one from the $Gamma$-point and one from each of the Fermi points, with further complexity added by the presence of two valley states in each contribution." @default.
- W2904966776 created "2018-12-22" @default.
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- W2904966776 date "2019-10-16" @default.
- W2904966776 modified "2023-10-17" @default.
- W2904966776 title "Transverse profile and three-dimensional spin canting of a Majorana state in carbon nanotubes" @default.
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- W2904966776 doi "https://doi.org/10.1103/physrevb.100.155417" @default.
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