Topological and kinetic origins of fractional thermal conductance at the topological insulator--superconductor interface

A recent experiment by Roy et al. (Nat. Commun. 17, 2853 (2026)) demonstrated a robust half-integer thermal conductance plateau, κ_0 T/2, at a bipolar (ν,ν')=(2,-1) junction in bilayer graphene, produced not by non-Abelian topology but by full equilibration of co-propagating electron and hole edge m