Andreev Scattering and Chirality Blockade in Weyl Semimetals

Topological materials are special classes of superconductors, insulators or semimetals, identified by their band structure and their protected surface states. The recently-discovered topological Weyl and Dirac semimetals, in particular, are object of huge interest in the scientific community because of their high carrier mobility and the characteristic responses to electric and magnetic fields, which follow from their band structure. Several phenomena take place at interfaces between topological Weyl semimetals and other types of materials, which are especially relevant for technological applications, where the semimetal must be necessarily embedded within a heterostructure. Using Quantum Mechanics and Quantum Field Theory, we will conduct a theoretical study of a Weyl semimetal-superconductor interface, with focus on the transfer of charge through the process of Andreev Reflection, including different angles of orientation of the Weyl nodes compared to the junction.