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Topological insulators raise the exciting hope of realizing lossless energy transport, which is true at ultralow temperatures. However, topological insulators fail to maintain this lossless 'magic' at room temperature.

Researchers from Monash University, part of the FLEET Center, have uncovered new insights into the efficiency of topological insulators, illuminating the significant disparity between their magic lossless energy transport at ultralow temperatures and the detrimental issues that arise at room temperature.

The study, which was published in Nanoscale, investigates why topological insulators face serious challenges in maintaining their feature in a practical working environment, particularly by the role of electron-phonon interactions.

Topological insulators, particularly two-dimensional (2D) topological insulators, are well-known for their unique feature of conducting electricity through the boundary/edge while the bulk surface remains electrically insulating.

This unique feature allows one-way carrier transport without backscattering, with the resulting negligible scattering-induced electrical resistance giving rise to expectations of dissipationless carrier transport.

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