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Breakthrough Insulator Maintains Quantum Effects at -213°C

10/28/2025

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Summary

Story summary

Researchers at the University of Würzburg have developed a topological insulator that preserves the quantum spin Hall effect at around -213°C.
This approach addresses the limitations of traditional topological insulators, which typically function only at very low temperatures.
The material features a three-layer quantum well with indium arsenide forming the outer layers and a gallium-indium-antimony alloy in the middle.
The design increases the band-gap energy, enabling compatibility with silicon technology.

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Story summary

Researchers at the University of Würzburg have developed a topological insulator that preserves the quantum spin Hall effect at around -213°C.
This approach addresses the limitations of traditional topological insulators, which typically function only at very low temperatures.
The material features a three-layer quantum well with indium arsenide forming the outer layers and a gallium-indium-antimony alloy in the middle.
The design increases the band-gap energy, enabling compatibility with silicon technology.