Boundary Green's function approach for spinful single-channel and multichannel Majorana nanowires

• DOI: 10.1103/physrevb.101.094511
• Publication Date: 2020-03-12T08:04:17Z
• Authors: M. Alvarado; A. Iks; A. Zazunov; R. Egger; A. Levy Yeyati
• Keywords: Lattice (music)

The boundary Green's-function (bGF) approach has been established as a powerful theoretical technique for computing the transport properties of tunnel-coupled hybrid nanowire devices. Such nanowires may exhibit topologically nontrivial superconducting phases with Majorana bound states at their boundaries. We introduce general method bGF spinful multichannel lattice models such nanowires, where is expressed in terms roots secular polynomial evaluated complex momentum space. In many cases, those roots, and thus bGF, can be accurately described by simple analytical expressions, while otherwise our allows numerically efficient evaluation bGFs. show that from behavior physical quantities key interest inferred, e.g., value bulk topological invariants, energy dependence local density states, or spatial decay subgap excitations. apply to single- two-channel symmetry class D DIII. addition, we study spectral multiterminal Josephson junctions made out nanowires.