An international team working with single-atom thick crystals found TaIrTe4's transition between the two distinct topological states of insulation and conduction. The material exhibited zero electrical conductivity within its interior, while its boundaries remain conductive. The team's investigation determined that the two topological states stem from disparate origins. The novel properties can serve as a promising platform for exploring exotic quantum phases and electromagnetism.
The findings introduce a novel effect that the team calls the dual topological insulator or the dual quantum spin Hall insulator, Ma said. "Our investigation aimed to understand how these materials conduct electricity," Ma said."Given the minuscule size of these materials, we employed advanced nanofabrication techniques, including photolithography and electron beam lithography, to establish nano-sized electrical contacts."
Ma said future work on the discovery includes collaborations with groups skilled in other specialized techniques, like nanoscale imaging probes, to further understand the unexpected behavior.
Materials Science Physics Graphene Nanotechnology Quantum Physics Energy Technology Electricity
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