Experimental verification of dissipationless edge transport in Xenes

Show dissipationless charge transport along the helical edge states of germanene and stanene by demonstrating quantized conductance without backscattering, thereby verifying quantum spin Hall edge transport in these two-dimensional Xene materials.

Background

Two-dimensional Xenes such as germanene and stanene possess buckled honeycomb lattices with strong spin-orbit coupling, making them promising candidates for room-temperature quantum spin Hall insulators.

While robust edge states have been identified, direct transport evidence of dissipationless conduction—central to validating their quantum spin Hall functionality—has not yet been achieved.