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Researchers have successfully synthesized TaSiAs nanowires that exhibit significantly lower electrical resistance at room temperature, a breakthrough driven by the material's unique topological square-net structure. This development offers promising pathways for advanced interconnects and spintronic devices while maintaining stability through silica encapsulation, directly addressing key challenges in scaling quantum hardware components.

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Researchers Synthesise TaSiAs Nanowires for Next-Generation Quantum Computing

Quantum ZeitgeistJuly 29, 20265 min read

Electrical resistance in a newly synthesised material drops by a factor of four to eleven when formed into nanowires. This unexpected leap in conductivity, observed in tantalum silicide arsenide (TaSiAs), challenges conventional understanding of square-net topological materials. Encapsulating these single-crystal nanowires with a silica shell maintains stability and reveals coherent electron flow along their surfaces, potentially enabling advances in future electronics and quantum technologies.

Realising low-dimensional topological square-net materials has long been a challenge. Anand Roy of the Weizmann Institute of Science and colleagues have successfully synthesised high-quality, single-crystal nanowires of TaSiAs, a square-net topological material, and encased them within a protective SiO2 shell. Room-temperature resistivity in these TaSiAs nanowires is four to eleven times lower than in comparable bulk materials, indicating improved electrical conductivity. The team have successfully created nanowires from TaSiAs, a square-net topological material with a unique atomic structure. These tiny wires, encased in a…

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