Tomography of Zero-Energy End Modes in Topological Superconducting Wires

ALIGIA, A.A.; PÉREZ DAROCA, D.; ARRACHEA, LILIANA

PHYSICAL REVIEW LETTERS

AMER PHYSICAL SOC

Año: 2020 vol. 125

0031-9007

We describe the Majorana zero modes in topological hybrid superconductor-semiconductor wires with spin-orbit coupling and magnetic field, in terms of generalized Bloch coordinates f,?,d. When the spin-orbit coupling and the magnetic field are perpendicular, f and d are universal in an appropriate coordinate system. We show how to extract the angle ? from the behavior of the Josephson current-phase relation, which enables tomography of the Majorana modes. Simple analytical expressions describe accurately the numerical results.