: It involves the scattering of electrons at the interface of a superconductor and a material like a Weyl semimetal .
In the field of topological materials and superconductors, stands for Retro-Andreev Reflection . A "perfect RAR" occurs when an incident electron from a normal metal or semimetal is completely reflected back as a hole into the same band, with its velocity components inverted. Perfect.rar
: Researchers have found that for certain energy levels (subgap energies), the probability of this reflection reaches a "perfect" state (1.0 probability), which contributes to universal conductance values. : It involves the scattering of electrons at